(a) Complete the following statements by writing appropriate words in the spaces. The pressure of a gas in a sealed container is caused by the collisions of
with the container wall.
An increase in the temperature of the gas increases the pressure because the
of the
increases.
The force on the wall due to the gas is the pressure multiplied by the
[2]
of the wall.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

What are the factors that affect the resistance of a wire?