A roller coaster train with a mass of 500 kg stops at the top of a hill. If the hill is 110 m high, what is the potential energy of the train? 4,900 J 5,612 J 55,000 J 539,000 J

How many copies of a gene does an organism have in its cells

two ice skaters push each other, and move in opposite directions. the mass of one is 75 kg, and his speed is 2 m/s. if the mass of the other is 30 kg, what is her speed?

What is one difference between water and ice? Ice is more compressed than water. Ice atoms have more charge than water atoms. Water has a lower temperature than ice. Water atoms move more easily than ice atoms.

If Sam performs fewer push-ups in a set after a three week break, he understands the A. muscular endurance principle B. exercise specificity principle C. law of reversibility

The following is an example of which type of reaction? CH3OH + O2 → CO2 + 2H2O + heat

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N

Which force keeps you near earths surface?

Name one process that requires a force in the human body.