What gives you a frame of reference for your speed when you are riding a train

a. the wheels of the train

b. the sky overhead

c. the train tracks

d. the station

If railroad tracks were built over the boundary of two plates what would happen to the railroad tracks as the plates moved

The strength of the force depends on which two factors?

A 2.0-kg ball rolls to the right at 3.0 m/s. A 4.0-kg ball rolls to the left at 2.0 m/s. What is the momentum of the system after a head-on collision of the two balls?

When solar energy is converted to thermal energy, how is the thermal energy used? Check all that apply To provide air conditioning To cool refrigerators To heat spaces in buildings To heat water

What two particles in an atom are equal in number

A tire swing is released from some initial height such that the speed of the tire at the bottom of the swing is 2.5 m/s. What is the initial height of the tire? Note: g = 9.8 m/s2 A 0.13m B 0.16m C 0.32m D 3.1 m

Paleoclimatologists study the climate and its changes throughout earths history. what observation by paleoclimatologists led scientists to predict that the average temperature of the planet is rising due to the combustion of fossil fuels?

Which is bigger, a kilometer or a mile?

A coach wants her team to have fun, win some games, and be a productive unit. What is the most important personality trait the coach should demonstrate to achieve her goals? sportsmanship leadership persistence discipline

You slide a box of books at constant speed up a 30° ramp, applying a force of 200 n directed up the slope. the coefficient of sliding friction is 0.18.