4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the

helicopter?

A hoop (I = MR2) of mass 2.0 kg and radius 0.50 m is rolling at a center-of-mass speed of 15 m/s. An external force does 750 J of work on the hoop. What is the new speed of the center of mass of the hoop?

The current theory of the structure of the Earth, called plate tectonics, tells us what the continents are in constant motion.

The lake water in a location in Florida has been found to contain high levels of fecal coliform. What are people in the location most likely to do? Select one: a. breed fish in the lake b. stop swimming in the lake c.

Which of the following best describes a chemical equation that demonstrates the law of conservation of matter? A. It has five total atoms on each side. B. It has four molecules on each side. C. It has two compounds on each side. D.

Which properties is shared by solids liquids and gas

How do inertia and centripetal force combine to keep an object moving in circular motion?

Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C, 0.5 L of coffee at 38°C, and 0.25 L of tea at 43°C.

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5