How much time is needed to stop a fan completely if it is moving at 30rad/s. its radius is 2m. The linear decceleration of a point 1.5 m from
center is 5m/s2.

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon