Aclock has a second hand whose tip rubs against the inside of the glass cover. if the frictional force between the glass cover and the tip of the second hand is 0.0020 and the length of the hand is 8.0 cm, what is the minimum torque that must be applied to the second hand if the clock is not to be stopped? what is the direction of the torque from the friction?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Photons with the highest energy have the longest period