Calculate the gravitational potential energy of a 1200 kg car at the top of a hill that is 42 m high.

Which of the following describes sound waves? A. Mechanical waves in which the vibrations are perpendicular to the motion of the sound B. Electromagnetic waves in which the vibrations are parallel to the motion of the sound C.

In order to sail through the frozen Arctic Ocean, the most powerful icebreaker ever built was constructed in the former Soviet Union. At the heart of the ship's power plant is a nuclear reactor with a power output of 5.60 * 10^7 W.

Problem 20.75 A thin rectangular coil 2 cm by 9 cm has 44 turns of copper wire. It is made to rotate with angular frequency 110 rad/s in a magnetic field of 1.9 T.

When Sequoia measured the sound from the tube open at one end and closed at the other, she only observed three, equally-spaced, peaks in the Fourier transform window, and thus recorded three frequencies (150 Hz, 450 Hz, and 750 Hz).

And object has traveled 200 m in 20 seconds what is its average speed

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?

Why is there controversy to the opinion that human contribution of carbon dioxide to the atmosphere is cause warming

If the resistance of a circuit increases, that means that the current has to

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate