Mechanical waves, such as sound waves, travel fastest in what medium?

Two plane mirrors are inclined at an angle of 70. For a ray of light, incident on mirror 1, its angle of reflection from mirror 2 is

What is the speed of a 0.145kg baseball if it's kinetic energy is 109 j

What are nonexamples of force

1. What would be the final temperature of a mixture of 50g of water at 200C temperature and 50g of water at 400C temperature?

A gamma ray and a microwave traveling in a vacuum have the same (1) frequency (3) speed (2) period (4) wavelength

During a snowball fight two balls with masses of 0.4 kg and 0.6 kg, respectively, are thrown in such a manner that they meet head on and combine to form a single mass of 1 kg. the magnitude of intial velocity foreach is 15 m/s.

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?