Draw a free-force body diagram of all the forces acting on the stopper that is being rotated on the string above one’s head in a horizontal circle of a fixed radius.

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.