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Physics
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Derive an expression to show that for satellites in a circular orbit T² ∝ r ³ where T is the period of orbit and r is the radius of the orbit.

For an object to stay in a steady orbit; F=mv2/r where: F is the force on the object towards the centre of the orbit, m is the mass of the object, v is the radial velocity of the object, and r ...

Answered by James M. Physics tutor
4924 Views

A pipe has one open and one closed end. Determine the ratio of the frequency of the first harmomic to that of the next harmonic.

The first harmonic has wavelength λ1 = 4L and the next harmonic has wavelength λ2 = 4L/3<...

Answered by Pablo M. Physics tutor
2255 Views

A student of mass m=50kg runs an experiment. He throws a ball of mass m = 400g from a height h = 20m. What will be the speed of the ball he records just before it touches the ground?

First, we need to see what the important information in this problem is: the mass of the student is irrelevant as the problem focusses on the ball. So we now know that the important information is: m = 40...

Answered by Martina M. Physics tutor
1456 Views

What are Newton's 3 laws of motion?

First law: Unless acted upon by a force, a object either remains at rest or moves at a constant speed.Second Law: Force=Mass*AccelerationThird Law: For every action there is an equal and opposite reaction...

Answered by Tomas A. Physics tutor
1530 Views

What is the maximum speed of an electron emitted from a metal surface with a threshold frequency of 5.706*10^(14) by light with a wavelength of 350nm?

In order to determine the maximum speed of an emitted electron, we must first find it's kinetic energy from the energy of an incident photon and the work function of the metal surface (the minimum energy ...

Answered by Mattea G. Physics tutor
10527 Views

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