What kind of friction is occurring between a pencil and desktop when you flick the pencil?

Rolling friction

Fluid friction

Static friction

Sliding friction

What is the relationship between the speed of light and the index of refraction of a transparent substance?

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart? a - a football thrown in the airb - a kite flying on a stringc - a golf ball rolling off a table d - water spraying from a fountain

3.00Kg toy falls from a height of 1.00m. What is the kinetic energy just before the ground?

g The electric field in a sinusoidal wave changes as E = 125 N>C2cos 311.2 * 1011 rad>s2t + 14.2 * 102 rad>m2x] (a) In what direction does the wave propagate? (b) What is the amplitude of the electric field oscillations?

It is theorized that protons and neutrons are actually formed from a combination of smaller particles. what are these particles called?

When all parts of a circuit are composed of conducting materials, the circuit is said to be A. parallel. B. closed. C. open. D. shorted.

You travel an an average speed of 20 km/h in a straight line to get to your grandmothers house. It takes you 3 hours to get to her house. How far away is her house from where you started?

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.

What conversion factor is needed to change from kilometres to meters