Which of these models of the solar system first proved that the sun is at one of the foci of Earth's elliptical orbit?

Describe how energy can be converted from one form to another in a wind-up toy.

How is light generated?

What are two processes that result in rocks being broken down into smaller pieces?

If the second harmonic of a certain string is 42 Hz, what is the fundamental frequency of the string? 21 Hz 42 Hz 84 Hz 126 Hz

What happens when multiple forces act on an object?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.