Select the correct answer. Brian is repairing an old alarm clock. He needs to replace a device that converts the electric energy into sound energy. Which of these devices should he use? A. battery B. buzzer C. motor D. switch

What is needed to make alternative energy sources widely accepted?

You throw a baseball straight upward. the drag force is proportional to v2. in terms of g, what is the y-component of the ball's acceleration when the ball's speed is half its terminal speed and (a) it is moving up? (b) it is moving back down?

An object of mass 80kg moves with a velocity of 4m/s. calculate the kinetic energy of the object

A child in a boat throws a 5.90-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 28.0 kg and that of the boat is 35.0 kg.

refrigerant 134a enters a compressor operating at steady state as saturated vapor at 0.12 MPa and exits at 1.2 MPa and 70 C at a mass flow rate of 0.108kg/s.

Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. As the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will a. decrease. b.

The voltage in a battery is 9 volts. The resistance is 3 ohms. What is the current?

What do you call a group of cats?

Justin, with a mass of 30 g, is going down a 8.0 m high water slide. he starts at rest, and his speed at the bottom is 11 m/s. how much thermal energy is created by friction during his descent

Which of the following is NOT a type (shape) of galaxy? Question 3 options: a) triangular b) irregular c) spiral d) elliptical