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Physics
A Level

what would be the mass required to keep an object with a mass of 250kg orbiting at a constant distance of 100km with a linear velocity of 100m/s?

the linear speed of an orbiting body is given by the equation sqrt(GM/2r) where M is the mass of the attracting body, G is the gravitational constant and r is the distance between the two bodies' centres ...

MA
Answered by Michael A. Physics tutor
2065 Views

What is the Young's modulus of a material?

The Young's modulus is a measure of the stiffness of the material - higher the young's modulus, higher the stiffness. It is calculated by dividing stress by strain over the elastic deformation region and ...

MS
Answered by Manika S. Physics tutor
2142 Views

Ignoring air resistance, use an energy argument to find the speed of a ball when it hits the ground if it is dropped from 50m, where m is the mass of the ball.

Original energy: GPE=509.81m KE=0 Final energy: GPE=0 KE=(1/2)mv2 Therefore (1/2)mv= 50m9.81 . The m cancels and simplifying the equation we are left with v2...

ZT
Answered by Zach T. Physics tutor
2437 Views

If f(x)= ln(x^2)-4, give f^-1(x)

For this question we would start by making f(x)=y. As we know the laws of logs, we can say that ln(x2)=2ln(x), therefore our equation can now be written as y= 2ln(x) - 4 . From this point, we w...

ZT
Answered by Zach T. Physics tutor
2434 Views

Explain how bright fringes arise in Young's double slit experiment

To answer this question, we need to think about 3 things: interference, phase and path difference

In the experiment, we have monochromatic light (from a laser) going through two slits and then brig...

HM
Answered by Harveer M. Physics tutor
4038 Views

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