inelastic collision
75.3+60.5=(75+60)v'
225+300=135v'
v'=3.8 m/s
direction = positive = right
On average, each square metre of the solar
panel above receives 1000 joules of energy
from the Sun every second. Use this figure to
calculate the power input (in kW) of the panel if
its surface area is 2 m?
1 m² = 1000 J/s = 1000 watt = 1 kW
so for 2 m²:
= 2 x 1 kW = 2kW
where are most of the comets in our solar system found?
Answer:
some far beyond the edge of the solar system called the Oort Cloud, and some beyond Neptune in a region called the Kuiper Belt.
Explanation:
Hopefully this helps
Does the efficiency of a motor depend on mass?
Practically yes
Efficiency=Output/inputSo
If mass is more output may come less so it affects the efficiency practically
But thepritically it doesn't
Answer:
Yes
Explanation:
Formula of motor efficiency
η = Input Load (E₀)/ Output Load(E₁)We know from simple physics that the energy of a body is directly proportional to its mass. Here, in the working of a motor, mass may not be involved directly, but the electrical energy required to provide a function will likely have more efficiency when working with lesser masses.
50 joules of energy are transferred out of a system. The energy is lost through heat, mechanical, and electrical energy took up 15 j and electrical energy took up 10 j, how many joules were lost through heat energy?
Answer:
25 joules
Explanation:
Not sure I understood correctly but since 15 are taken up by mechanical energy and 10 are taken in by electrical, 50-10-15 would result in 25 joules which must belong to heat energy
It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then...
Select one:
a. the pulley rope is pulled 1 meter.
b. the pulley rope is pulled more than 1 meter, but less than 3 meters.
c. the pulley rope is pulled 3 meters.
d. the pulley rope is pulled more than 3 meters.
Answer:
b
Explanation:
It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then the pulley rope is pulled more than 1 meter, but less than 3 meters.
It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then. The correct answer is a. the pulley rope is pulled 1 meter.
When lifting a piano using a pulley system, the distance the pulley rope is pulled will be the same as the distance the piano is lifted. This is due to the mechanical advantage of the pulley, which reduces the amount of effort needed to lift the piano but does not change the distance the rope is pulled.
In a simple single fixed pulley system, where one end of the rope is attached to a fixed point and the other end is used to lift the piano, the distance the pulley rope is pulled will indeed be the same as the distance the piano is lifted.
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what will be the change in momentum caused by a net force of 240 N acting on an object for 3 seconds ?
Given the value of force applied in the given duration of time, the impulse or change in momentum caused by the net force is 720kgm/s.
What is Impulse?An impulse is simply a concept that involves the change in the momentum of an object when force is introduced for a period of time.
It is expressed as;
ΔP or Change in Momentum = F × t
Where F is force applied and t is the elapsed time.
Given the data in the question;
Force applied F = 240N = 240kgm/s²Time elapsed t = 3sImpulse ΔP = ?ΔP = F × t
ΔP = 240kgm/s² × 3s
ΔP = 720kgm/s
Given the value of force applied in the given duration of time, the impulse or change in momentum caused by the net force is 720kgm/s.
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Tyra pushes the pedals of her bicycle with her feet to make it go faster. Which of Newton's laws is demonstrated by this action
The impressed force increases when Tyra pushes the pedals of her bicycle, the momentum of the bike increases hence it moves faster.
What are the laws of motion?The Newton's laws of motion lay the foundation for dynamics. According to Newton's second law, the rate of change of momentum is directly proportional to the impressed force.
Hence, as the impressed force increases when Tyra pushes the pedals of her bicycle, the momentum of the bike increases hence it moves faster.
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When cell a sends a message to
cell b, ? occurs at cell
b.
a. osmosis
b. active transport
c. synaptic transmission
Answer:
c. Synaptic transmission
Explanation:
To transmit impulses/electronic signals around the body, nerve cells transfer messages across the synapse and the movement of the chemicals from one cell to the other is known as either diffusion or synaptic transmission.
Which physical activity would an augmented reality resource help you with? Diving High jumping Walking Weight lifting
Answer:
Keeping up your healthy lifestyle also means keeping up exercising. Exercise helps control your weight. It helps maintain it, or helps you loose weight. Even though having a healthy lifestyle, exercise also helps battle the chance of getting diseases and other illnesses. Exercise can help improve your energy level, as well as making sure you get the right amount of sleep. And besides all these, exercise can make you feel great in general, and help improve your overall mood.
Explanation:
Answer:
Diving, as it's not as accessible as the others.
Explanation:
This diagram shows a hydrogen atom. Explain why it looks
like it does
Make-up of Hydrogen
Hydrogen atoms are extremely simple. They are the first atom on the periodic table, this means that they only have 1 proton. The majority of hydrogen atoms don't even have a neutron. As for electrons, hydrogen atoms with no charge have 1 electron. All of this means that for almost all hydrogen atoms the nucleus is made of one singular proton.
Diagram
The diagram shows a hydrogen atom. It looks like one circle because it is just showing the singular proton found in the nucleus. Electrons are extremely small compared to protons, so the electron is not shown in the picture. It is very hard to accurately depict electrons on diagrams like this because of their size and the fact that we can never know where they are. So, the diagram may look too simple but it just depicts how most hydrogen nuclei look.
Answer: It only has 1 proton.
Which field of science gives us the idea that spacetime is not just a flat grid but is
itself a physical entity that can be bent and molded?
A: General Relativity
B: Time dilation
C: quantum mechanics
D: gravitational physics
The field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded is known as quantum mechanics. Thus, the correct option for this question is C.
What is Quantum mechanics?Quantum mechanics may be defined as a fundamental theory in physics that significantly provides a detailed description of the physical properties of nature at the scale of atoms and subatomic particles. It is basically the branch of physics that deals with the behavior of matter and light on a subatomic and atomic level.
Time dilation in the theory of special relativity is the “slowing down” of a clock as determined by an observer who is in relative motion with respect to that clock.
General relativity is the theory of gravity. The basic idea is that instead of being an invisible force that attracts objects to one another, gravity is a curving or warping of space. The more massive an object, the more it warps the space around it.
Therefore, quantum mechanics is the field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded. Thus, the correct option for this question is C.
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which direction should a ceiling fan turn in the summer
If a car went 30 miles in 5 hours, what is the speed?s = d/t
Can you help me I’m struggling?
What is the acceleration of a 100 kg object pushed by Beau with a force of 500 N? Write out your equation.
Answer:
ProvideD :
Mass ( m ) = 100 kg , Force ( F ) = 500 NTo FinD :
Acceleration ( a )SolutioN :
We know , F = ma so put up the values and then solve for a[tex] \longrightarrow \tt \: 500 = 100a[/tex]
[tex] \longrightarrow \tt \: \frac{500}{100} = a[/tex]
[tex] \longrightarrow \tt \: a = \: \boxed { \tt{5 \: ms ^{ - 2} }}[/tex]
The acceleration produced is 5 ms ^ -2 .--------------- HappY LearninG <3 --------------
what evidence is there suggesting ellipticals may form from the mergers of 2 or more spiral galaxies
Elliptical galaxies could be formed by the collision and merging of two spiral galaxies.
What is galaxy?Galaxy is the huge collection of stars, interstellar gases, dust particles, stones. Galaxies tend to come in two shapes such as spirals and ellipticals.
In spiral galaxies, the stars orbit in a very thin disk, and all the stars move in the same direction. Two or more spiral arms wind around the center just like a pinwheel.
Selecting a sample of about 50 spiral galaxies that have collided and in the process of merging into a single object. We took infrared images using the UH 88-inch (2.2-meter) telescope, and obtained spectra of these mergers using one of the Keck telescopes.
Infrared images are used to see, if the starlight in these objects decreases with distance from the center of the galaxy the way it does in spirals or the way it does in ellipticals. The light intensity decreases exponentially in outward direction from the centers of spirals, but it declines much more slowly with distance from the center for ellipticals. It is found that at least 45 out of 51 mergers are ellipticals.
Thus, most of these mergers really are evolving into elliptical galaxies.
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A nuclear power plant is built alongside a river. what measurements should a monitoring station downstream record to be sure that the proper procedures are being followed at the power plant? density and radiation levels radiation levels and dust levels salt concentration and temperature temperature and radiation levels
Nuclear power plant should have monitoring units and water purifiers units, so thet they followed propress in the plant.
What is nuclear power plant?
Nuclear power plant is a structure that allows the generation of energy from the fission of toxic materials. It is usually due to the risk of accidents. Nuclear energy is very important for the generation of electricity in many countries.
Hence, water purifiers units should be used in the downstream to measure to protect river should be taken.
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Answer:
temperature and radiation levels
Explanation:
edge
A ball falls down from the top of a height of 70m.
How much time the ball will take to reach the ground?
Apply second equation of kinematics
h=1/2gt²gt²=2h9.8t²=2(70)t²=140/9.8t²=14.3t=3.78sA monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that three different wavelengths are observed when the hydrogen relaxes back to the ground state.
Answer:
If the absorbed beam is monochromatic (one wavelength) then it excites the H atom to some state n.
When that state decays, some of the atoms may decay to state 1, others to state 2, and still others to state 3
The net energy emitted in such a case would depend on:
n -1, n - 2, n - 3 which would produce 3 different wavelengths
Most asteroids orbit the Sun between:
A.
Mercury and Venus.
B.
Mars and Jupiter.
C.
Neptune and Pluto.
D.
Saturn and Uranus.
Answer:
mars and jupiterrr
Explanation:
ty for all ur help love u
Let each shake of the pennies or thumbtacks represent 1 year. what is the half life, in years, for the pennies in experiment 1? what is the half-life, in years, for the thumbtacks in experiment 2?
(5.4.3 lab - nuclear physics)
The half-life of the pennies in experiment 1 and 2 will be the time it takes for half the pennies to fall off after shaking.
What is Half-Life?Half-Life is the time required for half the amount one a given substance to disappear or decay.
The half-lives of substances are usually constant values.
For example, the Half-Life of radioactive carbon-14 is 5700 years.
Therefore, the half-life of the pennies in experiment one and two will be the time it takes for half the pennies to fall off after shaking.
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ILL GIVE BRAINLIEST I PROMISE!
Option C, speed of light will increase as the light rays moves from water to air.
What is refraction of light?The refraction of light is the change in speed of light when it moves from one medium to another.
Light travels faster when it moves from a denser medium to a less dense medium while the speed of light decreases when light passes from a less to a more dense medium.
Water is more dense than air, thus speed of light will increase as the light rays moves from water to air.
Option C depicts increase in speed from water to air.
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Does this equation show that transmutation has taken place during decay?
Why or why not?
6128 Ni -> 6128 Ni + y
A. Yes, because the numbers of nucleons and atoms are conserved.
B. No, because there is conservation of the number of atoms as well as the number of nucleons.
C. Yes, because the nickel atoms remain nickel atoms with the same number of neutrons.
D. No, because high-energy electromagnetic waves are emitted.
Explanation:
Transmutation means change in neutron numbers u
Like for example
When Potassium (N=19 ) goes through beta decay it forms (N=20)
Here no change in neutrons (Same 28)
So no trnasmutaions.
Option B
178 79 Au is a(n) __
of gold
Answer: No, but yes
Explanation:
EXPLAIN IT
2. What particle completes this equation?
Answer:
C it's a balanced equation of Helium gas
Calculate the molar mass of sucrose:
Answer:
342 g/mole
Explanation:
Mass of the carbon = 12 g
Mass of the hydrogen = 1 g
Mass of the oxygen = 16 g
Given: Chemical Formula of the Sucrose = C12H22O11
Molar mass = 12 x 12 + 1 x 22 + 16 x 11
= 144 + 22 + 176
= 320 + 22
= 342 g/mole ➪ molar mass of the sucrose
342 g.
Explanation:
C12H22O11 ------> SugarCarbon has mass -> 12
Hydrogen has mass -> 1
Oxygen has mass -> 16
=> (12× 12 ) + (1 ×22 ) + ( 16 × 11 )
=> 144 + 22 + 176
=> 342 gram
__________________Molecular mass : The Molecular mass of a substance is the sum of the atomic masses of all atoms in a molecule of a substance, e.g ., Molecular mass of water is 18u.H2O = 2 × H + 1 × O=> 2 × 1 + 1 ×16 = 2+16= 18 u. Mass of one mole of a substance is called its molar mass. ___________________what is a Molecule?
A Molecule is the smallest Particle of an element or a compound capable of independent existence under ordinary conditions. It shows all the properties of tge substance.Please help mee please
Answer:
eV to Joules just multiply by 1.602 × 10^-19
Hence, 1.5eV = 1.5 × 1.602 × 10^-19 J
= 3.04 × 10^-19 J
What is the potential difference if the current of 2A flow in 5sec in wire,total energy in wire to flow the charge is 500J.please its urgent.
Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.
What is the potential difference?The electric power is expressed as P = VI.
Where V is the potential difference, I is the electric current and P is the electric power.
Also, the consumption of energy per unit of time is called power. It is expressed as P = E / t
Given that;
Current I = 2.00AElapsed time t = 5sTotal energy E = 500JFirst, we determine the power.
P = E / t
P = 500J / 5s
Power = 100W
Next, we determine the potential difference.
P = V × I
V = P / I
V = 100W / 2.00A
V = 50V
Given the total energy in the wire, current and time elapsed, the potential difference is 50 Volts.
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The Potential difference is 50 Volts.
What is the potential difference?The potential difference is a measure of the energy given to the charge carriers in a circuit
We know that the electric power is expressed as P = VI.
V is the potential difference
I is the electric current
P is the electric power.
Also we know that power is expressed as P = E / t
Given
Current( I) = 2.00A ,time t = 5s
Total energy E = 500J
To find the power
P = E / t = 500J / 5s = 100W
Now , To find the potential difference.
P = V × I (By rearranging it)
V = P / I
V = 100W / 2.00A = 50 V
Therefore , the total energy in the wire, current and time elapsed, the potential difference is 50 V.
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Suppose sunlight just outside earth's atmosphere has an intensity of 1.47 kw/m2. calculate (a) em and (b) bm for sunlight there, assuming it to be a plane wave.
Intensity of the sunlight and magnetic field amplitude will be 1.03 ×10³ V/m and 3.43 ×10⁻⁶ T respectively.
What is a magnetic field?It is the type of field where the magnetic force is obtained. With the help of a magnetic field. The magnetic force is obtained, it is the field felt around a moving electric charge.
The intensity of the sunlight is found as;
[tex]\rm I = \frac{E_m^2}{2 \mu_0C} \\\\ E_m= \sqrt{2 \mu_0I_c} \\\\ E_m=\sqrt{(2 \times 4 \pi \times 10^{-7} m/A)(1.40 \times 10^3 \ W/m^2 )(2.988 \times 10^8 m/sec)} \\\\ E_m=1.03 \times 10^3\ V/m[/tex]
The magnetic field amplitude is found as;
[tex]\rm B_m= \frac{E_m}{c} \\\\\ B_m=\frac{1.03 \times 10 \ V/m^}{3 \times 10^8 \ m/sec} \\\\ B_m=3.43 \times 10^{-6} \ T[/tex]
Hence, intensity of the sunlight and magnetic field amplitude will be 1.03 ×10³ V/m and 3.43 ×10⁻⁶ T respectively.
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A 1.1-m tall child is standing 6.0 m from a spherical convex mirror. The child’s image is 0.40 m behind the mirror. What is the image height and focal length of the mirror?
Answer:
1 / i + 1 / o = 1 / f thin lens equation
(i + o) / o i = 1 / f
f = o i / (i + o) = 6 * -.4 / (-.4 + 6) = -2.4 / 5.6 = -.42 m
The focal length is -.42 m indicating a convex mirror
M = -I / O = -.4 / 6 = -.067 negative magnification indicates erect image
O = M * 1.1 = -.067 * 1.1 = -.073 m height of image
One must be careful with signs because they can vary with textbooks