speed of a body spinning about an axis increased from rest to 100 rpm in 5 sec if a constant torque is then removed and the body comes to rest in 100 sec due to friction. calculate the frictional torque​

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th