A 30 kg block slides down a 20° ramp with an acceleration of 1.2 m/s2. What is the coefficient of kinetic friction between the block and the ramp?

The orbit of a spacecraft around the Sun has a perihelion distance of 0.1 AU and an aphelion distance of 0.4 AU. What is the semimajor axis of the spacecraft? What is its orbital period?

What are nonmetals in general

Sally is going shopping with her friend Susan at the mall which is located 10 kilometers away from her house she drives half way to the mall and then realizes she forgot her purse at home she turns around and goes back home to get it and drives

Which of the following is a zone found in the open ocean

Why do most surfaces reflect light diffusely? 1. Most surfaces are clear. 2. Most surfaces are 100% smooth. 3. Most surfaces are not totally smooth. 4. All surfaces are smooth.

What evidence can you present for the possibility of time travel?

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?

One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15 feet. what is the area of the kite?

As the width of an opening in a barrier increases, how will the amount of diffraction of the planar waves change as they pass through the opening? A. It will increase. B. It will decrease. C. It will remain the same.