The Earth and Moon are gravitationally bound to each other, but due to external forces the Moon is gradually moving away from the Earth at a rate of 3.8 centimeters per year. This is not due to the expansion of the Universe. In fact, galaxies as a whole are gravitationally bound i.e. a galaxy...
Yes, and he still spent an extra 19.2 mins on the trip. You can't just forget about that time.
Just think about running around your block. If you run at a constant speed of 10km/hr, your average speed is obviously, 20km/hr. But if you stop for 30 seconds to take a breath halfway through...
Use the relation between heat capacity, mass, temperature and heat.
Look up values for heat capacity, specific heat capacity and latent heat of fusion/melting for water.
You would need to know something else - either the frequency and the medium through which the wave moved, or the distance the wave traveled and the number of modes.
Use the fact that to remain in a circular orbit, the gravitational force must equal the centripetal force.
You do not need to know acceleration of the satelite
Yes, you should have Frictional force acting in the x direction = u_k * N_B
However, your leading term: N_B which stands by itself should not be there.
N_B is the force that the ramp exerts on the block, and while it is an important term in determining the frictional force, it in itself...
your meaning of x component of weight of block B seems to be the same as my meaning of x component of gravity. Gravity is dragging the block down the ramp, but not at the rate mg, it is damped by a factor of sin(theta) of which you have written down correctly.
N should not be there
No your Tension looks like the right sign, but if your W is the 'x component of gravity' term then that needs to be positive, since it's directing your block to the right.
There is no x component of a Normal force so leave out N.
Keep note that your coordinate system doesn't matter, but...
As far as I can tell your math is good, but I don't think you need this 'weight' term in Fnetx B. Your terms in Fnetx B should be Tension - Friction - xcomponent of Gravity