Use the word contact force in a sentence.

A 170 lb fire fighter is carrying 75 lb of equipment up (10 in.) stairs. There are 15 stairs per story in this building. How many dietary calories does the fire fighter burn in climbing 10 flights of stairs

Lava is rock that has undergone a physical change and has liquefied. What is known about this change?

Which is better for prying open a stuck cover from a can of paint - a screwdriver with a thick handle or one with a long handle? Which is better for turning stubborn screws? Explain

A dart leaves a toy dart gun with initial velocity of 7.76 m/s, regardless of the angle it is fired. What is the maximum horizontal distance that the dart can travel? Assume that the dart gun is fired at ground level. More information is needed. 6.

Eat the majority of your calories in the evening to fuel your sleep hou True False

Hannah has information about an object in circular orbit around Earth. mEarth = 6.0 * 1024 kg G = 6.67 * 10-11 What additional information does Hannah need in order to calculate the tangential speed of the orbiting object?

All objects are attracted to each other by the force of

Samantha wants to study circus performance when she gets to college. She has mastered many physical skills already, but she keeps falling short on her jumps.

Is this Conduction, Convection, or Radiation: The top floor of a building is the warmest.

The law that states the volume of gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is * a. Boyle's Law b. Gay-Lussac's Law c. Einstein's law. d. Charles's law.