Which of the following is made from a Crystaline solid that conducts a current only under certain circumstances?

•vacuum tube

•cathode-ray tube

•analog device

•semiconductor

In a video game, a flying coconut moves at a constant velocity of 20 meters/second in the positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second.

Calculate the specific heat capacity of substance having mass 5 kg whose temperature increase from 15°C to 25°C by the supply of 19 KJ

What is the kinetic energy of a 10 g bullet moving at 300 m/s?

In a gasoline engine,__ energy is converted into kinetic energy. is it thermal?

A 70 kg man is standing on the earth. a. what is his mass? b. what is his weight?

What happens to the inertia of an object of its mass is decreased?

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.