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4 years ago

Given equation is F=mv ×v/R what is the relationship exist between F and R?

1 answer:

8 0

This is called an "inverse" relationship because the bigger R becomes, the smaller F becomes as a result. you can do a couple of calculations on your calculator to see this (just increase R and watch what happens to F).

Also, when an equation has F = (x.y)/R^2 we call this the "inverse square" relationship, since it is also inverse, but squared. In practice it means that every time you double R, F decrease by 4 times! You will see this in physics a lot, so it's good to know!

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A point charge of 5.7 µC moves at 4.5 × 105 m/s in a magnetic field that has a field strength of 3.2 mT, as shown in the diagram

Nataly_w [17]

Answer:

$6.6\cdot 10^{-3} N$

Explanation:

The magnitude of the magnetic force acting on the charge is given by

$F=qvB sin \theta$

where

$q=5.7 \mu C = 5.7 \cdot 10^{-6} C$ is the magnitude of the charge

$v=4.5\cdot 10^5 m/s$ is the velocity of the charge

$B=3.2 mT = 0.0032 T$ is the magnitude of the magnetic field

$\theta = 90^{\circ}-37^{\circ} =53^{\circ}$ is the angle between the directions of v and B

Substituting the numbers into the equation, we find:

$F=(5.7\cdot 10^{-6})(4.5\cdot 10^5)(0.0032)(sin 53^{\circ})=6.6\cdot 10^{-3} N$

8 0

4 years ago

Read 2 more answers

Calculate the radiation dosage (in grays) for an 79-kg person that is exposed for 6.0 seconds to a 3.0 C source of beta radiatio

myrzilka [38]

Answer:

The absorbed energy by the person is $6.74\times10^{-4}\ grays$

Explanation:

Given that,

Mass of person = 79 kg

Time = 6.0 s

Beta radiation = 3.0 C

Energy $E = 1,6\times10^{-13}\ J$

We need to calculate the number of disintegration in 3 ci

$N=3.0\times\dfrac{3.7\times10^{10}\ disintegration/s}{ci}\times3.0\ s$

$N=3.33\times10^{11}\ disintegration$

We need to calculate the total energy of beta particle

$E=3.33\times10^{11}\times1.6\times10^{-13}\ J$

$E=0.05328\ J$

We need to calculate the energy absorbed by the 79 kg of person

$E'=\dfrac{E}{m}$

Put the value into the formula

$E'=\dfrac{0.05328}{79}$

$E'=6.74\times10^{-4}\ J/kg = grays$

Hence, The absorbed energy by the person is $6.74\times10^{-4}\ grays$

5 0

3 years ago

Difference between impulse and impulsive force

Mrrafil [7]

Impulse is caused by a force during a specific time that is equal to the body's change of momentum
Impulsive force: the process of minimizing an impact force can be approched

8 0

3 years ago

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How long does it take for the hubble telescope to orbit earth

il63 [147K]

Answer:

95 minutes

Explanation:

According to N.A.S.A, the Hubble Space Telescope makes one orbit around Earth every 95 minutes.

"The Hubble Space Telescope is a large telescope in space. It was launched into orbit by space shuttle Discovery on April 24, 1990. Hubble orbits about 547 kilometers (340 miles) above Earth. It is the length of a large school bus and weighs as much as two adult elephants. Hubble travels about 5 miles per second: That is like traveling from the eastern coast of the United States to the western coast in 10 minutes. Hubble is solar-powered.

Hubble takes sharp pictures of objects in the sky such as planets, stars and galaxies. Hubble has made more than one million observations. These include detailed pictures of the birth and death of stars, galaxies billions of light years away, and comet pieces crashing into Jupiter's atmosphere.

Scientists have learned a lot about the universe from these pictures. Many of them are beautiful to look at."

3 0

4 years ago

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Explain how you think humans have disrupted the nitrogen cycle HELP QUICK DUE APRIL 15TH ANYBODY

mina [271]

Answer:

Scientists have determined that humans are disrupting the nitrogen cycle by altering the amount of nitrogen that is stored in the biosphere. The chief culprit is fossil fuel combustion, which releases nitric oxides into the air that combine with other elements to form smog and acid rain.

5 0

3 years ago