True or False: When describing motion, there is no need to include the direction of motion.

A 73.0 kg firefighter climbs a flight of stairs 9.0 m high. how much work is required? j

In a solid, the atoms are tightly locked in position and do not change position. (B) True (A) False

A force of 100 newtons is applied to a box at an angle of 36º with the horizontal. If the mass of the box is 25 kilograms, what is the horizontal acceleration of the box?

If pie trays are stacked on top of a Van de Graaff they will fly into the air one after another. Why does this happen?

If a wind is blowing from a siren toward your ear, does the frequency of the siren change? Why?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you