With their up-and-down and side-to-side motions, s waves shake the ground surface and can do severe damage to buildings.

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

Ajoint produces movement when its angle decreases. which type of movement is it?