All four planets contain stable atmospheric layers, a mantle, and a core. One of the following is FALSE regarding the four terrestrial planets (Earth, Mars, Mercury, and Venus).
Which of the following traits do the four terrestrial planets share?Terrestrial planets include Mercury, Venus, Earth, and Mars because of their compact, stony surfaces that resemble terra firma on Earth. The four innermost planets in the solar system are the four terrestrial planets.
What are the four features of planets that are terrestrial?The four innermost planets are known to as terrestrial planets and feature a moon or moons, valleys, volcanoes, and craters. They also have a liquid heavy-metal core.
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suppose that a plate is immersed vertically in a fluid with den- sity and the width of the plate is at a depth of meters beneath the surface of the fluid. if the top of the plate is at depth and the bottom is at depth , show that the hydrostatic force on one side of the plate is w (x) at a depth of meters
beneath the surface of the fluid. If the top of the plate is at
depth and the bottom is at depth , show that the hydrostatic
force on one side of the plate is
The force that results when a liquid under pressure acts on surfaces that are submerged is known as a hydrostatic force. Fundamental concepts in fluid mechanics include the calculation of the hydrostatic force and the location of the centre of pressure.
suppose that a plate is immersed vertically in a fluid with den- sity and the width of the plate is at a depth of meters beneath the surface of the fluid. if the top of the plate is at depth and the bottom is at depth ,[tex]$$F=\int_a^v \rho g x w(x) d x,$$[/tex]
where [tex]$g$[/tex] stands for the acceleration of gravity.
Solution. Pick a point [tex]$x \in[a, b]$[/tex] and consider a horizontal section of the plate through [tex]$x$.[/tex]
Suppose this section defines a thin rectangle of height [tex]$\Delta x$[/tex] and width [tex]$w(x)$[/tex]whose area is [tex]$w(x) \Delta x$[/tex]. The pressure on this thin rectangle is then [tex]$\rho g x$[/tex], and therefore the hydrostatic force is given by
[tex]$$F=P A=\rho g x w(x) \Delta x$$[/tex]
The total force is then approximated by adding over different horizontal sections:
Taking the[tex]limit Delta x 0 yields[/tex]
[tex]F=\int_a^b \rho g x w(x) d x .$$[/tex]
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during a knee extension exercise there are two forces that are producing torque at the knee joint. one is the quadriceps muscle and the other is the weight at the ankle joint. the quad is capable of producing 500 newtons of force, while the weight at the ankle is 10 kg. the distance from the knee joint to the quad force is 0.05 meters and the distance from the knee joint to the weight is 0.38 meters (these are not the moment arms). the knee is flexed to 125 degrees. draw and calculate the moment arms for each force on the picture below and decide if the joint flexes or extends.
The moment arm for each force is 0.218 m and 0.0287 m , and the joint is a flex .
In the question ,
it is given that ,
quad force is ([tex]F_{q}[/tex]) = 500 N
weights at the ankle is wₐ ,
So , wₐ = (10 Kg)(9.8 m/s²)
= 98 N
given
the distance from knee joint to weight(a) = 0.38 m
the distance from knee joint to quad force (q) = 0.05 m
From the diagram , we can see that ,
the moment arm for the weight is ([tex]a_{t}[/tex]) = a*cos55° = (0.38)*cos55° = 0.218 m
and
the moment arm for equal force([tex]q_{t}[/tex]) = q*cos55° = (0.05)*cos55° = 0.0287 m
Now , torque (net) = ([tex]F_{q} \times q_{t}[/tex]) - ([tex]w_{a} \times a_{t}[/tex])
After substituting the values , we get
Net Torque = 500×0.0287 - 98×0.218
= 14.35 - 21.364
we can see that as the net torque is negative , its weight will pull down the leg ,
So , the joint will flex not extend .
Therefore , The joint will Flex .
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to create the amount of energy that was discovered to be coming out of active galaxies you need an object with a lot of gravity: a .
In a black hole, the pull of gravity is so great that not even the most powerful electromagnetic waves can make their way out. According to general relativity, a black hole can arise if a massive object is so compact that it warps spacetime.
The event horizon is the threshold beyond which it is impossible to travel. According to general relativity, there are no locally observable features despite the fact that crossing them might drastically change the course of an object's life. A black hole is very similar to a perfect black body in that it does not reflect any light.
What's more, the same spectrum as a black body with a temperature inversely proportional to its mass is predicted by quantum field theory in curved spacetime for the radiation that event horizons generate. Stellar black holes have temperatures on the order of billionths of a Kelvin, making direct observations nearly impossible.
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The resistivity of a semiconductor can be modified by adding different amounts of impurities. A rod of semiconducting material of length L and cross- sectional area A lies along the z-axis between I= 0 and 1= L. The material obeys Ohm's law, and its resistivity varies along the rod according to p(2)=poexp(-x/L). The end of the rod at r=0 is at a potential Vo greater than the end at x=L
And p(2)=poexp(-x/L) describes how its resistivity changes along a rod. The rod's end at r=0 has a potential Vo that is higher than the end at x=L.Ohm's law is followed by the substance,
Solution p(x)=p₀ exp(-x/L)
(a) we know that R=PL/A
dR=ρ(x)dx/A=p₀ e[tex]^{-x/L}[/tex] dx/A
R=p₀/A[tex]\int\limits^L_0 e^{-x/L} \, dx[/tex]
R=(p₀L/A)(1-e⁻¹)
(b)I=V₀/R=V₀A/p₀L(1-e⁻¹)
(c)ρ=E/J
E=ρJ
E(x)=Ip₀e[tex]^{-x/L}[/tex]/A=V₀Ap₀ e[tex]^{-x/L}[/tex]/p₀L(1-e⁻¹)A
Hence E(x)=V₀ e[tex]^{-x/L}[/tex]/L(1-e⁻¹)
(d)R(x)=∫dR=p₀/A[tex]\int\limits^x_r e^{-x/L} \, dx[/tex]
R(x)=Lp₀/A(1-e[tex]^{-x/L}[/tex])
starting from left end of rod ,there is potential drop IR(x) at distance x
∴V(x)=V₀-IR(x)
V(x)=V₀( e[tex]^{-x/L}[/tex] -e⁻¹)/(1-e⁻¹)
The current through a conductor between two places is directly proportional to the voltage across the two points, according to Ohm's law. The typical mathematical equation that captures this relationship is reached by including the resistance as the constant of proportionality.
where I denotes the current flowing through the conductor, V is the voltage applied across the conductor, and R denotes the conductor's resistance. The R in this relationship is constant and independent of the current, according to Ohm's law. Although the previous equation cannot be referred to as Ohm's law if the resistance is not constant, it can still be used to define static/DC resistance. The conductivity of the great majority of electrically conductive materials is accurately described by Ohm's law, an empirical relation.
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a double pendulum consists of two simple pendula, with one pendulum suspended from the bob of the other. if the two pendula have equal lengths, $l$, and have bobs of equal mass, $m$, and if both pendula are confined to move in the same vertical plane, find lagrange's equations of motion for the system. use $\theta $ and $\phi$--the angles the upper and lower pendulums make with the downward vertical (respectively)--as the generalized coordinates. do not assume small angles.
The Lagrange's equations of motion for the system is d(ml³Ф2 + ml²Ф1 cos (Ф1-Ф2)) − (−ml³Ф1Ф2 sin (Ф1-Ф2)-mgl sinФ2 )/dt = 0.
Newton's method of developing the equations of motion requires element decomposition. If the forces on the connections are not the primary concern, it is more advantageous to consider the energies in the system to derive the equations of motion.
A double pendulum exhibits simple harmonic motion when the non-equilibrium displacement is small. However, when large displacements are imposed, the behavior of nonlinear systems becomes dramatically chaotic indicating that deterministic systems are not always predictable. There are several possible variations of the double pendulum.
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A viewing window 30 cm in diameter is installed 3 m below the surface of an aquarium tank filled with sea water. The force the window must withstand it approximately.
a. 22 N
b. 218 N
c. 2140 N
d. 8562 N
A viewing window 30 cm in diameter is erected 3 m below the surface of an aquarium tank filled with sea water. The force the glass must endure is roughly 8562 N.
Given,
Diameter = 30 cm
= 0.3 m
radius = 0.3/2
= 0.15
Total pressure = 1atm + hρg
= 10⁵ N/m + 1000 × 9.8 × 3
= 101325 + 29400
= 130725 Pa
therefore Force = 130725 × π × 0.15²
= 9235.721 N that is approximately 8562 N
An object experiences a push or pull as a result of interacting with another item. Each item is subject to a force whenever two things interact. The two items no longer feel the force after the interaction ends. Only by interaction do forces come into being.
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mcdougal products is considering the purchase of new equipment to place in its factory. the equipment would cost $365,000, have a ten-year useful life and a salvage value at the end of its useful life of $65,000. the company estimates that annual revenues and expenses associated with the equipment would be as follows: the payback period of the new equipment is closest to:
Form the given annual revenue and expenses the payback period of the new equipment is closest to 4 years .
What is Payback Period ?
Payback Period is defined as amount of time the company will have to wait before it recovers its investment.
the net annual cash flow can be calculated using the formula .
Net annual cash flow = (Net income) + (Non-cash items (i.e. depreciation))
From the table we get , net income = $60000
depreciation = $30000
So ,
Annual Cash Flow = 60000 + 30000 = $90000
We know that , Payback period is = (Initial investment)/(Annual cash flow)
= 365000/90000
= 4.055555 years
≈ 4 years .
Therefore , The payback period of the new equipment is closest to 4 years .
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a fixed quantity of gas at a constant temperature exhibits a pressure of 737 torr and occupies a volume of 20.5 l. use boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.80 atm.
Considering the Boyle's law, if the pressure is increased to 1.80 atm, the gas will ocuppy a volume of 11.04 L.
Boyle's lawBoyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant.
Boyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.
Mathematically, Boyle's law states that if the amount of gas and the temperature remain constant, the product of the pressure and the volume always has the same value:
P× V= k
where:
P is the volume.V is the volume.k is the constant.Considering the initial state 1 and the final state 2, it is fulfilled:
P₁× V₁= P₂× V₂
New volumeIn this case, you know:
P₁= 737 torrV₁= 20.5 LP₂= 1.80 atm= 1368 torr (being 1 atm= 760 torr)V₂= ?Replacing in Boyle's law:
737 torr× 20.5 L= 1368 torr× V₂
Solving:
(737 torr× 20.5 L)÷ 1368 torr= V₂
11.04 L= V₂
Finally, the new volume is 11.04 L.
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5. a particular satellite with a mass of 200kg is put into orbit around ganymede (the largest moon of jupiter) at a distance 300 km from the surface. what is the gravitational force of attraction between the satellite and the moon? (ganymede has a mass of 1.48x1023 kg and a radius of 2631 km.) (4 pts)
The gravitational force of attraction between the satellite and the moon is 1.44 x 10^22 N.
To calculate the gravitational force of attraction between the satellite and the Ganymede moon, you can use the formula:
F = (G * m1 * m2) / r^2where F is the gravitational force, G is the gravitational constant (which is approximately 6.67 x 10^-11 N*m^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between them.
Plugging in the values provided, we get:
F = (6.67 x 10^-11 N*m^2/kg^2) * (200 kg) * (1.48 x 10^23 kg) / (300 km)^2
= 1.44 x 10^22 N
This is the gravitational force of attraction between the satellite and the Ganymede. It is a very strong force, due to the large mass of the moon and the relatively close distance between the satellite and the moon.
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answer to this required:
Answer:
Explanation:
1) Conduction - 100% (C)
2) Convection can take place in vacuum is incorrect - 100% (A)
3) Remains same - 100% (D)
types of eye defects and their corrections
Nearsightedness that makes distant objects appear blurry.
Farsightedness (also called hyperopia) which makes nearby objects appear blurry.
Astigmatism which can make near and far objects appear blurry or distorted.
Simple harmonic motion for a block of mass.
the problem gives x(t)= A cos( (k/m)^(1/2) * t) A block of mass m is attached to a spring whose spring constant is k. The other end of the spring is fixed so that when the spring is unstretched, the mass is located at x=0. Assume that the +x direction is to the right.
we obtain v0 =−xm ωsinϕ=3.06m/s.
What is harmonic motion?
When the restoring force is proportionate to the displacement but acting in the opposite direction, an oscillating mass moves in a manner known as harmonic motion. The sine wave has a constant frequency and amplitude and can be used to describe harmonic motion because it is periodic.
What is mass?
The amount of matter in a particle or object is represented by its mass, which is denoted by the symbol m. In the International System (SI), the kilogram serves as the default unit of mass (kg).
ω= mK = 2.00kg/10100Nm
=7.07rad/s.
Energy methods provide one method of solution. Here, we use trigonometric techniques based on Eq. x=x m cos(ωt+ϕ) and Eq. v=−ωx
msin(ωt+ϕ).
(a) Dividing Eq. v=−ωxm
sin(ωt+ϕ) by Eq.x=xmcos(ωt+ϕ), we obtain
xv=−ωtan(ωt+ϕ)
So that the phase (ωt+ϕ) is found from ωt+ϕ=tan−1( ωx−v )=tan −1( (7.07rad/s)(0.129m)
−3.415m/s).
With the calculator in radians mode, this gives the phase equal to –1.31rad. Plugging this back into Eq.x=xmcos(ωt+ϕ), leads to 0.129m=xmcos(−1.31) ⇒xm=0.500m.
(b) Since ωt+ϕ=–1.31rad at t=1.00s, we can use the above value of ω to solve for the phase constant ϕ. We obtain ϕ=–8.38rad (though this, as well as the previous result, can have 2π or 4π (and so on) added to it without changing the physics of the situation). With this value of ϕ, we find x0=xmcosϕ=−0.251m.
(c) And we obtain v0 =−xm ωsinϕ=3.06m/s.
Therefore, we obtain v0 =−xm ωsinϕ=3.06m/s.
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a 90.0 g mass is attached to the bottom of a vertical spring and set vibrating. assume that the maximum speed of the mass is 25.0 cm/s and the period is 0.450 s.
a. Spring constant which has a maximum mass velocity of 25.0 cm/s and a period of 0.450 s = 17.49 N/m.
b. The amplitude of the motion of the spring = 0.0179 m.
c. Frequency of oscillation of the spring = 2.22 Hz.
The angular velocityBriefly, angular velocity is the angular speed accompanied by the direction. The unit of angular speed is rad/s or rad/minute or rad/hour.
Some of the equations that are often used are:
ω = [tex]\sqrt{\frac{k}{m}}[/tex]
ω = 2π/T
ω = angular velocity (rad/second)
k = the spring constant
m = mass of the object
f = frequency (rev/second)
T = period (second)
The question is incomplete, it should be:
Find the
a. constant of the spring?
b. amplitude of the motion?
c. frequency of oscillation?
We have,
Mass of the object = 90.0 g
The maximum speed = 25.0 m/s
The period = 0.450 s
Determine the angular velocity first,
ω = 2π/T
= 2π/0.450
= 4.44 π rad/s
So,
a. Spring constant:
ω = [tex]\sqrt{\frac{k}{m}}[/tex]
k = ω²m
= (4.44 π rad/s)² (0.09)
= 17.49 N/m.
b. The amplitude:
vm = (xm) (ω)
So, xm = vm/ω
= 0.25/4.44 π
= 0.0179 m
c. The frequency:
f = 1/T
= 1/0.450
= 2.22 Hz.
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A paperweight is placed on a tray and the combination is set into horizontal oscillatory motion with a frequency of f= 1.22 Hz. If the paperweight begins slipping when the amplitude of the motion is 5.00 x 102 m, determine the coefficient of static friction between the paperweight and the tray.
When a paperweight and tray are placed together and put into a horizontal oscillating motion, the coefficient of static friction between them is 0.2
Given frequency of motion (f) = 1.22 Hz.
the amplitude of the motion (A) = 5.00 x 10^-2 m
The coefficients of the normal force applied by the surface are determined as friction force.
Force of friction (Fr) = μ x normal force (F)
coefficient(μ) = F/Fr
we know that Fr = kx = mω^
2A anf F = mg
mω^
2A = μmg
μ = ω^
2A/g and ω = 2πf
μ = (2x3.14x1.22)^2 x 5x10^-2/9.8 = 0.2
Hence the coefficient = 0.2
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find the effective spring constant k of the two-spring system. give your answer for the effective spring constant in terms of k1 and k2 .
The spring constant k is (1/k₁ + 1/k₂ + 1/k₃)⁻¹.
The effective spring constant k of the two-spring system will be equal to (1/k₁ + 1/k₂)⁻¹, while the spring constant k′ of the three-spring system will be equal to (1/k₁ + 1/k₂ + 1/k₃)⁻¹.
Since only one force F acts, the force on spring with spring constant k₁ is F = k₁x₁ where x₁ is its extension
the force on spring with spring constant k₂ is F = k₂x₂ where x₁ is its extension
Let F = kx be the force on the equivalent spring with spring constant k
We must consider the variable x as the extension of each spring.
The total extension , x = x₁ + x₂
x = F/k = F/k₁ + F/k₂
1/k = 1/k₁ + 1/k₂
k = (1/k₁ + 1/k₂)⁻¹
B
The force on spring with spring constant k₃ is F = k₃x₃ where x₃ is its extension
Let F = kx be the force on the equivalent spring with spring constant k and extension x.
The total extension , x = x₁ + x₂ + x₃
x = F/k = F/k₁ + F/k₂ + F/k₃
1/k = 1/k₁ + 1/k₂ + 1/k₃
k = (1/k₁ + 1/k₂ + 1/k₃)⁻¹
Therefore, the value of spring constant k is (1/k₁ + 1/k₂ + 1/k₃)⁻¹.
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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: Consider two massless springs connected in series. Spring 1 has a spring constant k1, and spring 2 has a spring constant k2. A constant force of magnitude F is being applied to the right. When the two springs are connected in this way, they form a system equivalent to a single spring of spring constant k.
(A) What is the effective spring constant k of the two-spring system? Express the effective spring constant in terms of k1 and k2.
(B) Now consider three springs set up in series as shown. (Figure 2) The spring constants are k1, k2, and k3, and the force acting to the right again has magnitude F. Find the spring constant k′ of the three-spring system. Express your answer in terms of k1, k2, and k3.]
A potentiometer wire is 10 m long and has a resistance of `18Omega`. It is connected to a battery of emf 5 V and internal resistance `2Omega`. Calculate the potential gradient along the wire.
The potential gradient along the wire is 0.208Vm⁻¹
We are given that,
Resistance of wire = R = 20Ω
Internal resistance = r = 18Ω
length of wire = L = 10m
E.M.F = ∈ =5V
Thus to find the value of potential gradient of the wire, we can use the equation,
i = (∈)/(R+r)
i = 5v/ (20Ω +18Ω)
i = 0.104 A
Vr = iR =(0.104 A)(20Ω) =
Vr = 2.08 volt
Thus the potential gradient of the wire is given as,
potential gradient = V/L = (2.08volt)/(10m)
potential gradient = 0.208Vm⁻¹
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The capacitors in are initially uncharged and are connected as in the diagram with switch S open. The applied potential difference is Vab=+360V.a. What is the potential difference Vcd
b What is the potential difference across each capacitor after switch S is closed?
c. How much charge will flow through the switch after it is closed?
There is a flow of electrons from charged to uncharged whenever a charged capacitor is connected to an uncharged capacitor, and this flow continues until a steady state is reached. As a result, there is no further charge transfer and both capacitors are in equilibrium.
What does a capacitor being discharged mean?When we say a capacitor is uncharged, we imply that there are an equal amount of positively and negatively charged ions and electrons on each of its plates.
The capacitor's starting voltage is zero.
The capacitor's charge Q and voltage across it are both 0 before the switch is closed.
The charge has not had a chance to accumulate before the switch is closed.
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A Cassette Player Is Said To Have A Signal-To-Noise Ratio Of 62 DB , Whereas For A CD Player It Is 98 DB. What is the ratio of intensities of the signal and the background noise for each device?
The ratio of intensities of the signal and the background noise for each device is 7943.2 and 316.2 respectively.
The signal-to-noise ratio (SNR) is a measure of the strength of the desired signal relative to the background noise. It is usually expressed in decibels (dB).
A higher SNR indicates a stronger signal relative to the background noise, and therefore a higher quality of sound. To find the ratio of intensities of the signal and the background noise for each device, you can use the formula:
Intensity ratio = 10^(SNR/10)
For the cassette player with an SNR of 62 dB, the intensity ratio would be:
Intensity ratio = 10^(62/10) = 316.2
This means that the intensity of the signal is 316.2 times stronger than the intensity of the background noise.
For the CD player with an SNR of 98 dB, the intensity ratio would be:
Intensity ratio = 10^(98/10) = 7943.2
This means that the intensity of the signal is 7943.2 times stronger than the intensity of the background noise. Therefore, the CD player has a much higher intensity ratio and a higher quality of sound compared to the cassette player.
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Glycerin is poured into an open U-shaped tube until the height in both sides is 22 cm. Ethyl Alcohol is then poured into one arm until the height of the alcohol column is 18 cm. The two liquids do not mix. What is the difference in height between the top surface of glycerin and the top surface of alcohol?
The distinction in top among the pinnacle floor of glycerin and the pinnacle floor of ethyl alcohol is 0.0432 meter or 4.32 centimeter the difference in height between the top surface of glycerin and the top surface of alcohol is 4.32 centimeter.
Given the subsequent data:
Height of ethyl alcohol = 25cm to n = 0.25I mHydrostatic top = 20 cm to m = 0.2 m.Scientific data:Density of ethyl alcohol = 790 kg/m³Density of glycerin = 1260 kg / (m ^ 3)To calculate the distinction in top among the pinnacle floor of glycerin and the pinnacle floor of ethyl alcohol:The system for hydrostatic strain.Where:p is the density.g is the acceleration because of gravity.h is the top.At steady temperature, the strain on the pinnacle floor of glycerin withinside the open U-formed tube is identical to the strain on the pinnacle floor of ethyl alcohol:rho_*h_ = rho_*h_Substituting the given parameters into the system, we have;1260h_ = 790 * 0.251260h_ = 197.5h_ = 197.5/1260Height of glycerin = 0.1568 meters.Now, we are able to locate the distinction in top:Height of glycerin = 0.1568 meters.Now, we are able to locate the distinction in top:Difference = 0.2 - 0.1568Difference = 0.0432 meter or 4.32 centimeter.Read greater on hydrostatic strain here:
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the maximum energy a bone can absorb without breaking is surprisingly small. for a healthy human of mass 67 kg , experimental data show that the leg bones can absorb about 200 j .
Maximum height could a person jump and land rigidly upright on both feet without breaking his legs: h = 0.30 m
Briefly:
Potential energy = m g h would be present in a jumper at height h, and as the jumper hits the ground, this potential energy will totally transform into kinetic energy. Now, the human can only absorb a maximum of 200 J of energy.
m = 67 kg
g = 9.8 m/s²
⇒ m g h = 200 J
⇒ h = 200 J / (67 kg × 9.8 m/s²) = 0.30 m
Therefore, a person can only fall from a height of 0.30 m safely and without breaking both of their legs.
Whatever produces the most energy?In metabolic processes, lipids provide the most energy. On reduction, lipids turn into fatty acids. As a result, fat has a higher energy content than both glycogen and proteins together.
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Question:-
the maximum energy a bone can absorb without breaking is surprisingly small. for a healthy human of mass 67 kg , experimental data show that the leg bones can absorb about 200 j . part a from what maximum height could a person jump and land rigidly upright on both feet without breaking his legs?
The free-fall acceleration on the surface of the Moon is about one sixth that on the surface of the Earth. The radius of the Moon is about 0.250 RE (RE = Earth's radius = 6.4 106 m). Find the ratio of their average densities, rhoMoon/rhoEarth.
On the surface of the Moon, the free-fall acceleration is roughly one-sixth that of the Earth. Their average densities are 0.667 apart.
Given the radius of the Moon is (Rm) = 0.250 RE
The radius of the earth (RE) = 6.4 x 10^6 m
Let freefall acceleration of the moon = gm
Let freefall acceleration of the earth = ge
Given gm = ge/6
We know that g = Gm/r^2 where G is the gravitational constant
Let mass of moon = m1 and mass of earth = m2
Gm1/Rm^2 = Gm2/6xRE^2
mass = densityxvolume
let density of moon = d1 and density of earth = d2
d1 x (4/3Rm^3)/Rm^2 = d2x (4/3RE^3)/6xRE^2
d1xRm = d2xRE/6
d1/d2 = RE/6X0.250RE
d1/d2 = 0.667
Hence the ratio of densities of moon and earth is 0.667
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explain the effect of the added mass on the pressure and the relationship between the fluid levels on the two sides.
Pressure and mass flow relationship It follows that increasing the pressure supplied to the intake section will increase the pressure differential between the inlet and outlet valves.
More people will attempt to hurry past the segment as a result. As a result, we may state that pressure and mass flow rate are directly related (gradient). Mass flow rate is the amount of a substance that moves per unit of time in physics and engineering. In SI units, it is measured in kilograms per second, and in pounds or slugs per second in US customary units. Although occasionally (Greek lowercase mu) is used, the typical symbol is (, pronounced "m-dot"). The force that is delivered perpendicular to an object's surface and expressed as a symbol (p or P) is known as pressure.
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ssignment Score: 95.1% Resources Hint Check Answer mestion 30 of 31 > Match each characteristic to the planet it describes. Jupiter Saturn Uranus Neptune Answer Bank largest planet first planet discovered with a telescope least spherical has a me with a dense nitrogen atmosphere most highly inclined rotation artis the four Galilean mcm orbit this planet strongest magnetic field most conspicuous rings has the largest con in the Solar System has the medium sized moon Triton in orbit
Jupiter: largest planet Saturn: has the most conspicuous rings Uranus: has the most highly inclined rotation axis Neptune: has the medium-sized moon Triton in orbit
Jupiter is the largest planet in the Solar System, with a diameter of over 140,000 kilometers and a mass about 318 times that of Earth. It is the fifth planet from the Sun and is known for its strong magnetic field and large number of moons, including the four Galilean moons - Io, Europa, Ganymede, and Callisto - which were discovered by Galileo Galilei in the 17th century.
Saturn is the second-largest planet in the Solar System and is known for its beautiful and prominent ring system, which is composed of ice, rock, and dust particles. The rings are tilted relative to the planet's equator, and the width of the rings varies from about 10 meters to over 20,000 kilometers.
Uranus is the seventh planet from the Sun and is notable for its unusual orientation, with its axis of rotation tilted at an angle of about 98 degrees relative to its orbit around the Sun. This means that Uranus experiences extreme seasons, with each hemisphere experiencing about 42 years of daylight and darkness.
Neptune is the eighth and outermost planet in the Solar System and is known for its bright blue appearance and strong winds. It has a medium-sized moon called Triton, which orbits the planet in a retrograde direction (opposite to the planet's rotation). Triton is thought to be a Kuiper Belt object that was captured by Neptune's gravity and is the only large moon in the Solar System that orbits in this direction.
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you need to push the couch 4 m to the other side of the room. after the initial push to get it going you push on the 90 kg couch with a steady horizontal force of 600 n. the coefficient of kinetic friction between the couch and the floor is 0.6.
Force needed to push the couch 4 m to the other side of the room is 70.8 N.
Kinetic friction is described as a force that acts among transferring surfaces. A body transferring at the surface reports a pressure within the contrary direction of its movement. The value of the pressure will depend on the coefficient of kinetic friction among the two materials.
Calculation:-
mass = 90 Kg
force = 600 N
coefficient of the friction is 0.6
F = μN
= 0.6 × 90 × 9.8
= 529.2 N
force needed = 600 - 529.2
= 70.8 N
F = ma
a = f/m
= 70.8/90
= 0.78 m/s²
Static friction is what maintains the box from transferring without being driven, and it need to be conquer with a sufficient opposing pressure before the field will pass. Kinetic friction (additionally known as dynamic friction) is the force that resists the relative motion of the surfaces as soon as they may be in motion.
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a uniform sphere and a block are placed at rest at the top of a plane with inclination theta above the horizontal the sphere rolls down the plane without slipping and the block slides down the place it is found that tb - 15/7 ts where tb and ts are respectively the time it takes the block and the sphere to reach the bottom of the plane
The time it takes the block and the sphere to reach the bottom of the plane, uniform sphere and a block are placed at rest is 3 second
a=gsinθ1+K2R2
I=25MR2=MK2
K^2/R^2=2/5
θ=g×sin30∘1+25
a=5/7g×12
=57×9.8×12
=3.5m/s2
s=ut+12at2,
15.75=0+12×3.5×t2
t^2=15.75×23.5=9
t=3s
Time is described by physicists as the progression of events through the past, present, and future. A system is essentially timeless if it doesn't change. Time may be viewed as the fourth dimension of reality when describing events that occur in three-dimensional space. Time is something we cannot see, touch, or taste, but we can calculate how much of it has passed. Time is constant everywhere in classical mechanics. The timekeeping mechanisms continue to be accurate. Time is relative, however, as demonstrated by Einstein's special and general theories of relativity. It depends on the viewpoint of the observer. According to the theory of time dilation, intervals between events lengthen as one gets closer to the speed of light (dilates).
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for lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of italian ham. the slices of ham are weighed on a plate of mass 0.400 kg placed atop a vertical spring of negligible mass and force constant of 200 n/m . the slices of ham are dropped on the plate all at the same time from a height of 0.250 m . they make a totally inelastic collision with the plate and set the scale into vertical simple harmonic motion (shm). you may assume that the collision time is extremely small. Express your answer numerically in meters and take free-fall acceleration to be g= 9.80m/s^2
What is the period of oscillation T of the scale?
Express your answer numerically in seconds.
The period of oscillation T of the scale is T = 0.37 sec .
In the question ,
it is given that ,
weight of the Italian ham (m₁) = 0.300 Kg = 0.3 Kg
weight of the slices of ham are (m₂) = 0.400 kg = 0.4 Kg
the force constant of the vertical spring is(k) = 200 N/m .
Let oscillation period be = T ,
the plates make a totally inelastic collision ,
We know that , In inelastic collision, momentum is conserved but the kinetic energy is not conserved.
So , when the slice of ham land on the plate, then the kinetic energy of system equal to maximum potential energy of spring.
that means , T = 2π√(m₁ + m₂)/k
Substituting the values ,
we get ,
T = 2π√(0.3 + 0.4)/200
Simplifying further ,
we get ,
T = 0.37 seconds .
Therefore , If the collision is inelastic then the Period of oscillation is 0.37 s .
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The electric potential V in the space between two flat parallel plates 1 and 2 is given (in volts) by V = 1270x2, where x (in meters) is the perpendicular distance from plate 1. What is the magnitude and direction of the electric field at x = 3.5 cm? (Take the direction perpendicular to and away from plate 1 to be positive.)
The magnitude and direction of the electric field at x = 3.5 cm is 85.75V/m and is towards the plate 1.
Given the electric potential in the space between two flat parallel plates 1 and 2 is (V) = 1270x^2
the perpendicular distance from plate 1 is = xm = 3.5cm
We know that changing electric field is given as :
E(x) = -dV/dx
By differentiating we get :
E(x) = -(d(1270x^2)/dx)
E(x) = - (2*1270*x)
E(x) = -2540x
Here given x = 3.5cm = 0.035m
Then E(x) = -2450*0.035 = -85.75V/m
Hence the magnitude and direction of the electric field is 85.75V/m and is towards the plate 1
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Based on current science which of the following is the most reasonable range for possible values of the number of habitable planets, NHP, in our galaxy?
More than 1 billion is a credible estimate of the number of habitable planets, or NHPs, in our galaxy based on current scientific knowledge.
Out of the eight planets, three (Venus, Earth, and Mars) may be able to support life. One in five planets outside of our Solar System are thought to be capable of supporting life, according to recent findings of extrasolar planets: Planetary lifespan on average. Scientists estimate that the closest such planet may be 12 light-years away. There have been discovered 59 possible inhabited exoplanets as of June 2021. On K2-18b, an estimated 110 light years away super-Earth that may be habitable, water vapor has been found. The exoplanet was previously discovered by NASA's Kepler satellite in 2015, but data processing has uncovered new information that has never been seen on a super-Earth.
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Answer:
I agree as this is a very moving piece of information
A particle P of mass 0.5 kg rests on a rough plane inclined at angle α to the horizontal, where
sin α = 0.28. A force of magnitude 0.6 N, acting upwards on P at angle α from a line of greatest slope
of the plane, is just sufficient to prevent P sliding down the plane (see diagram). Find
(i) the normal component of the contact force on P, [2]
(ii) the frictional component of the contact force on P, [3]
(iii) the coefficient of friction between P and the plane.
Answer: To solve this problem, we can use the equations of static equilibrium to determine the forces acting on the particle P. In equilibrium, the sum of the forces and the sum of the moments must be zero.
Explanation:
(i) The normal component of the contact force on P is 0.58 N.
(ii) The frictional component of the contact force on P is 0.11 N.
(iii) The coefficient of friction between P and the plane is 0.19.
The forces operating on the particle P can be ascertained using the equations for static equilibrium. The total of the moments and the forces must be zero in an equilibrium state.
The contact force on P has a normal component of 0.58 N.
The 0.11 N frictional component of the contact force on P.
P and the plane experience 0.19 coefficient of friction.
What is meant by frictional component?Friction between two surfaces causes kinetic energy to be converted into thermal energy when they move in relation to one another (that is, it converts work to heat). The utilization of friction produced by rubbing pieces of wood together to start a fire serves as an example of how this attribute can have dramatic effects.
When a viscous fluid is agitated, for instance, kinetic energy is transformed into thermal energy. Wear, which can result in component damage or performance degradation
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