How to tell if two objects are in thermal equilibrium

1. the objects have the same temperature

2. the objects are the same size

3. the objects are touching each other

4. the objects temperatures are changing

Plants return water to the atmosphere through: transpiration perspiration elimination precipitation

If a ride at disneyworld goes from rest to 27 m/s in 2.8 seconds and the mass of the ride and riders together 5000kg. What is the average power required to do this? Give your answers in both watts and horsepower

Two students are standing on a fire escape, one twice as high as the other. Simultaneously, each drops a ball. If the first ball strikes the ground at time t, when will the second ball strike the ground?

If a hazelnut falls from a tree when the wind is blowing north, where will it land?

Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 74 km/h, while car be travels at a constant speed of 92 km/h. How far is car A from school 2.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

What sample of matter is a single substance

What is a hydraulic machine and what is its purpose? Explain how a simple hydraulic machine performs work.

Is the muzzle velocity a scalar or vector quantity?