Why are frames of reference important for motion

The Earth exerts a gravitational force of 500 newtons on an object what is the mass of the object in kilograms

4.2 mol of monatomic gas A interacts with 3.2 mol of monatomic gas B. Gas A initially has 9500 J of thermal energy, but in the process of coming to thermal equilibrium it transfers 600 J of heat energy to gas B.

What kind of habitat do we live in

A car is taking an unbanked curve. if you have the information about the radius of the curve and the coefficient of the static friction between tires and concrete, how can you determine the maximum speed with which the car can negotiate the curve

Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. What is the electric potential across an 8.00~/text{nm}8.00 nm-thick membrane if the electric field strength across it is 7.13~/text{MV/m}7.

When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by ...

Levi observed properties of four different waves and recorded observations about each one in his chart.

A rocket is shot straight up from the earth, with a net acceleration (acceleration by the rocket engine minus gravitational pullback) of during the initial stage of flight until the engine cut out at sec.

Which moon has a thick atmosphere made mostly of nitrogen?

J. J Thompson proposed that atoms were made up of positively charged particles with electrons scattered into them. How did he reach this conclusion?