Answer:
.Also we can change the frequency by decreasing wavelength , or increasing velocity
Explanation:
A uniform conducting rod of length 23 cm has a potential difference across its ends equal to 66 mV (millivolts). What is the magnitude of the electric field inside the conductor in units of N/C
The magnitude of the electric field inside the conductor will be 0.208 N/C.
What is an electric field?An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.
Given data;
length of rod = 25 cm = 0.25 m
Potential Difference = 52 mV = 0.052 Volts
The electric field is found as the ratio of the potential difference and the length;
[tex]\rm E =\frac{0.052}{0.25} \\\\ E=0.208 \ N/C[/tex]
Hence,the magnitude of the electric field inside the conductor will be 0.208 N/C.
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True or false: Mass is a scalar quantity. * (10 Points)
Answer: True
Explanation:
A scalar quantity is those quantities that only have magnitude and no direction. Therefore the value doesn't change with direction.
1. In what direction does the Earth rotate?
2. How long does it take for the Earth to complete one rotation?
3. What causes day and night?
4. Why is it daytime on one side of the Earth and nighttime on the other side?
5. Is Earth’s rotation important? Explain your answer.
Answer:
In what direction does the Earth rotate?Earth rotates eastward, in prograde motion. As viewed from the north pole star Polaris, Earth turns counterclockwise.
How long does it take for the Earth to complete one rotation?The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.
What causes day and night?Earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each. Earth has seasons because its axis doesn't stand up straight.
Why is it daytime on one side of the Earth and nighttime on the other side?Earth and sun are part of the solar system, with the sun at its centre. An Earth day is 24 hours because the Earth spins on its axis once every 24 hours. At any one time half of the Earth's sphere is in sunlight (day) while the other half is in darkness (night).
Is Earth’s rotation important? Explain your answer.The Earth's axis runs from the North Pole to the South Pole. It takes the Earth 24 hours, or one day, to make one complete rotation around this invisible line. As the Earth rotates, each area of its surface gets a turn to face and be warmed by the sun. This is important to all life on Earth
if both the mass and velocity of a moving object are doubled, how will the objects momentum change
Answer:
The momentum will quadruple
Explanation:
Original momentum
momen = mv
now increase both
momen = 2m * 2v = 4 mv <====== the momentum has quadrupled
What is an example of an analogue signal?
Examples of analog signals are Human voice, Thermometer, Analog phones etc.
What is signal?Signal is defined as an electromagnetic wave that carries information through a medium. In this, the data is converted into electromagnetic signal which may be analog or digital and then sent from sender to receiver.
Signal which are continuous as time varies are analog signals.
Thus, examples of analog signals are Human voice, Thermometer, Analog phones etc.
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Answer:
Examples of analog signals are Human voice, Thermometer, Analog phones etc. Examples of digital signals are Computers, Digital Phones, Digital pens, etc.
Which of the following is correct for speed?
A vector
Depends on Distance
Unit is a meter/second (m/s)
A vector
Depends on Displacement
Unit is a meter/second (m/s)
A scalar
Depends on Distance
Unit is a meter/second (m/s)
A scalar
A
Depends on Displacement
Unit is a meter/second (m/s)
Answer:
Speed is a "scalar" quantity
(C) is the correct answer
An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.
Show the molecular formula and electron structure of the simplest compound that forms with only carbon and hydrogen atoms.
The simplest compound of hydrocarbon is methane
The formula is CH_4It belongs to alkane group and has single bonds.The electron structure attached
The magnetic field 0.225 m from a
wire is 4.29 x 10-7 t. how much
current is flowing through the wire?
need asap please will give brainiest
Answer:
i = 0.483 A
Explanation:
B = [tex]\frac{U.i}{2pi*r}[/tex]
So, here the r is 0.225 m
The Magnetic field is 4.29 x [tex]10^{-7}[/tex] t
U. = 4π x [tex]10^{-7}[/tex] x i
4.29 x [tex]10^{-7}[/tex] = (4π x [tex]10^{-7}[/tex] x i) / (2π * 0.225)
Cutting [tex]10^{-7}[/tex]
4.29 = [tex]\frac{4π * i}{2π * 0.225}[/tex]
4π and 2π canceled, left with 2
4.29 = [tex]\frac{2i}{0.225}[/tex]
4.29*0.225 = 2i
0.96525 = 2i
i = [tex]\frac{0.96525}{2}[/tex]
i = 0.482625 A
Rounding to 3 digits after decimal, we get
∴ i = 0.483 A
6. What quantity does the gradient of the distance - time graph represent? Justify your answer.
Answer:
speed
Explanation:
In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.
The speed of light traveling through an unknown material is 1.98×108 m/s. Given that the speed of light in a vacuum is 3.00×108 m/s, what is the dielectric constant of the unknown material?
The dielectric constant of the unknown material is 2.3.
What is dielectric constant?Dielectric constant is referred as a relative permittivity or amount of charge required to produce one unit of electric flux in a given medium.
Given the speed of light in vacuum c =3 x 10⁸ m/s and the speed of light through an unknown material v = 1.98 x 10⁸ m/s.
The dielectric constant is related to the velocity by the following relation,
v = c/√K
Rearranging for dielectric constant, we get
K = (c/v)²
Substitute the value into the expression ,we get
K =(3 x 10⁸ / 1.98 x 10⁸)²
K = 2.3
Thus, the dielectric constant of the unknown material is 2.3.
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______ is how something feels.
Color
Volume
Length
Temperature
Texture
Answer:
Texture is how something feels.
What does a capacitor do in a circuit?
What is the best definition
of the atomic number?
A. the number of protons found in the nucleus
B. the number of protons found outside the
nucleus
C. the number of neutrons found in the nucleus
a is the correct answer
Explanation:
no.of proton defines atomic number in an atom
Answer: a
Explanation:
An atomic number is the number of protons found in the nucleus. The number of protons is equal to the number of electrons. The atomic mass the atomic number add the amount of neutrons.
PLEASE HELP ME I ATTACHED A SCREEN SHOT PLS SOLVE ASAP
Answer:
B. Negative acceleration means this car is slowing down.
Explanation:
for the other screenshot
Average acceleration = change in velocity /change in time.
[a = ∆V/∆t] —this the formula.
NOTE:
u = initial velocity (velocity it started with)
v = final velocity (velocity it ended with)
t = time {the time you were given)
a = acceleration.
listing out our givens:
u =o —(the unit is m/s)
v = 40 —(the unit is also m/s)
t = 0.08 —(the unit is s) "s" means second(s).
Soo
a = 40-0 / 0.08 = 500 m/s² ( unit for velocity is m/s²)
( Remember when using the formula we subtract the initial from the final velocity.........I mean we remove the initial from final) if not you will get a negative answer or wrong answer).
also note: final velocity is always bigger in value than initial velocity EXCEPT it is in deceleration meaning for example a car that was speeding is gradually stopping then initial (the one it started with) will be bigger than the one it ended with (because as it gradually stops the speed reduces).
VELOCITY is speed in a specified direction.
you're super free to ask any questions
Good luck ✅.
Air masses that form over continents in source regions that are cold are called__________.
Group of answer choices:
continental tropical (cT)
maritime tropical (mT)
maritime polar (mP)
continental polar (cP)
Answer:
Continental polar.
Explanation:
it should be a continental polar air mass because, it is cold.
A boy pushes a toy car along the floor at a steady speed. Are the forces on it balanced
or unbalanced?
Answer:
the forces are balanced :)
Explanation:
A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 32.5 m/s. With what maximum speed can it go around a curve having a radius of 66.0 m
Answer:
Approximately [tex]21.6\; {\rm m\cdot s^{-1}}[/tex], assuming that the coefficient of kinetic friction between the tires and the ground stays the same.
Explanation:
Let [tex]\mu_{k}[/tex] denote the coefficient of kinetic friction between the tires and the ground.
Let [tex]m[/tex] denote the mass of the truck. Let [tex]g[/tex] denote the gravitational field strength. The weight of this truck would be [tex]m\, g[/tex]. Since the curve is flat, the magnitude of the normal force [tex]F_\text{normal}[/tex] between the truck and the ground would also be [tex]m\, g\![/tex].
Let [tex]v = 32.5\; {\rm m\cdot s^{-1}}[/tex] denote the speed at which the truck goes around the curve with a radius of [tex]150\; {\rm m}[/tex]. The (horizontal) centripetal acceleration of the truck would be:
[tex]\displaystyle a = \frac{v^{2}}{r}[/tex].
The horizontal net force on the truck (of mass [tex]m[/tex]) would need to be exactly:
[tex]\displaystyle F_\text{net} = m\, a = \frac{m\, v^{2}}{r}[/tex].
The friction between the tires of the truck and the ground is the only horizontal force on the truck. Thus, this friction would need to supply the entirety of this horizontal net force:
[tex]\displaystyle F_\text{friction} = F_\text{net} = \frac{m\, v^{2}}{r}[/tex].
Notice that increasing [tex]v[/tex] would require an increase in the kinetic friction between the truck, [tex]F_\text{friction}[/tex]. However, since [tex]F_\text{friction}\![/tex] is at most [tex]\mu_{k}\, F_\text{normal}[/tex] (which is equal to [tex]\mu_{k}\, m\, g[/tex]):
[tex]\begin{aligned}\frac{m\, v^{2}}{r} &= F_\text{friction} \\ & \le \mu_{k}\, F_\text{normal} \\ &= \mu_{k}\, m\, g\end{aligned}[/tex].
Therefore, when the radius of the curve is [tex]r^{\prime}[/tex], the maximum velocity of this truck would be:
[tex]\begin{aligned}v^{\prime} &= \sqrt{\mu_{k}\, g\, r^{\prime}}\end{aligned}[/tex].
Likewise, it is possible to express [tex]\mu_{k}[/tex] in terms of [tex]r[/tex], [tex]g[/tex], and max speed [tex]v[/tex]:
[tex]\displaystyle \mu_{k} = \frac{v^{2}}{r\, g}[/tex].
Substitute this expression for [tex]\mu_{k}[/tex] back into the expression for [tex]v^{\prime}[/tex]:
[tex]\begin{aligned}v^{\prime} &= \sqrt{\mu_{k}\, g\, r^{\prime}} \\ &= \sqrt{\frac{v^{2}}{r\, g}\, g\, r^{\prime}} \\ &= \sqrt{v^{2}\, \frac{r^{\prime}}{r}}\end{aligned}[/tex].
Given that [tex]v = 32.5\; {\rm m\cdot s^{-1}}[/tex], [tex]r = 150\; {\rm m}[/tex], and [tex]r^{\prime} = 66.0\; {\rm m}[/tex]:
[tex]\begin{aligned}v^{\prime} &= \sqrt{v^{2}\, \frac{r^{\prime}}{r}} \\ &= \sqrt{(32.5\; {\rm m\cdot s^{-1}})^{2} \times \frac{66.0\; {\rm m}}{150\; {\rm m}}} \\ &\approx 21.6\; {\rm m\cdot s^{-1}}\end{aligned}[/tex].
What is the radius of a cone with a volume of 96π cubic inches and a height of 18 inches? 1. rewrite the formula using the base area: 2. substitute the values into formula: 3. simplify the right side: 4. undo the multiplication of 6π: 5. undo the square: what is the radius of the cone? inches v = one-third pi r squared h. 96 pi = one-third pi r squared (18). 96 pi = 6 pi r squared. 16 = r squared. startroot 16 endroot = startroot r squared endroot.
Based on the calculations, the radius of this cone is equal to 4 inches.
How to calculate the radius of a cone?Mathematically, the volume of a cone is calculated by using this formula:
V = 1/3 × r²h
Where:
h is the height.r is the radius.Making r the subject of formula, we have:
r = √(3V/πh)
Substituting the given parameters into the formula, we have;
r = √(3 × 96π/π × 18)
r = √(288/18)
r = √16
Radius, r = 4 inches.
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Explain what happens to plasma osmolarity when you give a severely dehydrated person large amounts of pure water.
Plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
What is plasma osmolarity?The electrolyte–water balance of the body is measured by plasma osmolality. This amount can be determined in a variety of ways, including measurement and computation.
Osmolality and osmolarity are two separate measurements that are used interchangeably in everyday situations.
When you are dehydrated, osmolality rises, and when you have too much fluid in your blood, it drops.
The way your body regulates osmolality is unique. When your body's osmolality rises, your body produces antidiuretic hormone.
Hence,plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
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A photon has an energy of 2.88 x 10^-18 j. convert this energy into ev.
Answer:
E = V Q voltage * charge
Since the charge on an electron is e = 1.6E-19 coulombs
the energy of 1 eV is 1.6E-19 joules
E = 2.88E-18 joules / 1.6E-19 joules/electron volt
E = 18 eV
12
9. An empty, massless cube is measured to have all sides equal to 11 cm. It is floating in water and will slowly be filled with sand
that has a density of 3.5 g/cm'. What volume of sand will cause the box to sink?
Answer:
See below ~
Explanation:
An object will sink in water when its density is greater than that of water, which is 1 g/cm³.
Volume of the box is 1331 cm³. (11³)
Maximum mass of sand will be 1331 g. [because 1331/1331 = 1 g/cm³]
Volume of sand = Mass of sand / Density of sandVolume (sand) = 1331/3.5Volume (sand) = 380.29 cm³If the volume of sand is greater than 380.29 cm³, the box will sink in water.
A truck travels a curve of radius 17 m and the mass of the truck is 5,900kg. The force of the truck is F = 2.685 x ?
The acceleration of the truck is 45.5 m/s² and the velocity of the truck is 27.8 m/s.
Acceleration of the truck
The acceleration of the truck is calculated as follows;
F = ma
a = F/m
a = (2.685 x 10⁵)/(5900)
a = 45.5 m/s²
Velocity of the trucka = v²/r
v² = ar
v² = 45.5 x 17
v² = 773.64
v = 27.8 m/s
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What is the speed of light in quartz
Answer:
Approximately 2.06⋅108 meters per second.
Explanation:
Which layer of the sun can easily be viewed by visible light?.
The sun will spend most of its lifetime in which stage?.
It would be really helpful if someone answered this.
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
According to first law of reflection, we know that :
Angle made by the incident ray and normal [ i.e angle of incidence ] is always equal to Angle made by the reflected ray and normal [ i.e Angle of reflection ]
Therefore, we can say that the missing angle (angle of reflection) has the same value as the angle of incidence which is equal to 45°
Please read the statement through to understand the procedure ~
When two forces act in the same direction on an object, the net force is found by ....................the forces.
1. adding
2.subtracting
3.multipling
4.dividing
Answer:
By ADDING the forces
Explanation:
All the following are momentum oscillators except a. Relative Strength Index (RSI) b. Moving Average Convergence/Divergence (MACD) c. Stochastics d. Advance/Decline Line
All the following are momentum oscillators except Advance/Decline Line.
What are momentum oscillators?
Momentum oscillators measure the amount that a security's price has changed over a given period of time.
Examples of momentum oscillatorsRelative Strength Index (RSI) Moving Average Convergence/Divergence (MACD) StochasticsThus, all the following are momentum oscillators except Advance/Decline Line.
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On an ice skating rink, a girl of mass 50 kg stands stationary, face to face with a boy of mass 80 kg. the children push off of one another, and the boy moves away with a velocity of 3 m/s. what is the final velocity of the girl? –1.9 m/s 1.9 m/s –4.8 m/s 4.8 m/s
The final velocity of the girl after the collision is determined as -4.8 m/s.
Final velocity of the girl
The final velocity of the girl is determined from the principle of conservation of linear momentum.
m1u1 + m2u2 = m1v1 + m2v2
50(0) + 80(0) = 50(v1) + 80(3)
0 = 50v1 + 240
50v1 = -240
v1 = -240/50
v1 = -4.8 m/s
Thus, the final velocity of the girl after the collision is determined as -4.8 m/s.
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The brakes on a 17,600 N car exert a stopping force of 650. N. The car’s velocity changes from 25.0 m/s to 0 m/s.
a) What is the car’s mass?
b) What was its initial momentum?
c) What was the change in momentum for the car? d) How long does it take the braking force to bring the car to rest?
(a) The mass of the car is 1,795.92 kg
(b) The initial momentum of the car is 44,897.96 kgm/s.
(c) the change in momentum for the car is 44,897.96 kgm/s..
(d) The time it takes the braking force to bring the car to rest is 69.4 s.
Mass of the carThe mass of the car is calculated as follows;
W = mg
m = W/g
m = (17,600)/9.8
m = 1,795.92 kg
Initial momentum of the carPi = mvi
Pi = 1,795.92 x 25
Pi = 44,897.96 kgm/s
Change in momentum of the carΔP = Pf - Pi
ΔP = 0(1,795.92) - 44,897.96 kgm/s
ΔP = - 44,897.96 kgm/s
Time taken for the car to come to restF = ma
-650 = 1,795.92(a)
a = -650/1,795.92
a = -0.36 m/s²
v = u + at
0 = 25 - 0.36t
0.36t = 25
t = 69.4 s
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