The diagram below shows a horizontal 12-newton
force being applied to two blocks, a and b, initially
at rest on a horizontal, frictionless surface. block a
has a mass of 1 kilogram and block b has a mass of 2
kilograms.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.