Electric current flows when there is a-

a. charge pump

b. closed circuit

c. conductor

d. all of these

A 32kg kid on a sled sliding over some rough snow is acted on by a frictional force which reduces its velocity form 8.5 m/s to 4.1 m/s in 3.0 seconds what is the magnitude of the frictional force?

What is the relationship between power and current?

Which two element are we know about from everyday use and how are they similar how are they different?

a car travelled 60 km west in 1.33 h along straigt line, then returned back east for 40 km in 0.67 h. its average velocity

Why is the spectrum of a star called an absorption spectrum?

What happens to the wavelength of a wave if you increase the frequency?

In a transverse wave, the particle motion is what to wave motion? A. perpendicular B. parallel

Which agent of weathering breaks down limestone statues?

A charged particle moves at 2.5 * 104 m/s at an angle of 25° to a magnetic field that has a field strength of 8.1 * 10-2 T. If the magnetic force is 7.5 * 10-2 N, what is the magnitude of the charge?

Earthquakes along the subduction zones near Sumatra and Chile are some of the strongest in the world.