Which of the following is contact force

a) magnetic force

b) friction

c) gravity

d electrical force

What did newtons discover about gravity?

Any compound that has at least one element from Group 17 is called a

A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of 12.5 cm and a length of 112 cm. Through one end there is an inward magnetic flux of 36.4 μWb. At the other end there is a uniform magnetic field of 2.

The need for__ is a secondary drive

What two temperature scales are commonly used in the United States

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons

Gamma radiation can be significantly reduced by ... A sheet of paper Air A 3 mm thickness of aluminium Several cm of lead