# Search results

1. ### Centre of Mass of a Uniform Cuboid -- Show that it is at the Center

Yeah, if I did this question I would naturally distinguish between those two but I never asked myself why that is fundamentally the case.
2. ### Centre of Mass of a Uniform Cuboid -- Show that it is at the Center

Yeah. I solved a lot of integrals. I know I need to distinguish between ##V## the volume and ##V## the integration parameter. I just never asked myself why you fundamentally have to do it.
3. ### Centre of Mass of a Uniform Cuboid -- Show that it is at the Center

Yeah yz is the constant cross area
4. ### Centre of Mass of a Uniform Cuboid -- Show that it is at the Center

Well I am going from x1 to x2 but it's all multiplied by yz
5. ### Centre of Mass of a Uniform Cuboid -- Show that it is at the Center

So, I volunteered to run a seminar to first year students in my college. They got a question like this for homework recently and a lot of them made a mistake in the calculation. I am not asking for help with the question itself because I know how to do it. However, a lot of students made a...
6. ### Energy of a crystal in thermal equilibrium

Homework Statement In a monatomic crystalline solid each atom can occupy either a regular lattice site or an interstitial site. The energy of an atom at an interstitial site exceeds the energy of an atom at a lattice site by an amount ε. Assume that the number of interstitial sites equals the...
7. ### ∆KE if angle between force and displacement varies

Or it can also be expressed as cos inverse of x/√x^2 +1.3^2
8. ### ∆KE if angle between force and displacement varies

I suppose the angle can be expressed as Tan inverse of 1.3/x
9. ### ∆KE if angle between force and displacement varies

It is displaced in the negative x direction and the force in that direction is negative 25cosA
10. ### ∆KE if angle between force and displacement varies

It's the dot product of the two
11. ### ∆KE if angle between force and displacement varies

Its the transfer of energy to or from an object due to the action of a force.
12. ### ∆KE if angle between force and displacement varies

Well they are equal to each other. Im just not sure how to calculate the work done
13. ### ∆KE if angle between force and displacement varies

Homework Statement A string is attached to a block that can slide along a frictionless horizontal surface aligned along the x axis. The left end of the string is pulled over a pulley of negligible mass and friction at a height of 1.3m so that the block slides from x1=3m to x2=1m. The tension...
14. ### Calculate the frequency of microwave

Homework Statement Two single frequency coherent microwave beams are directed from the same point towards a concave mirror. One beam is incident parallel to the principal axis of the mirror, 0.06m from the axis. The other beam passes through the focal point before striking the mirror. The...