A 380-N girl walks down a flight of stairs son that she is 2.5 m below her starting level. What is the change in the girl's gravitational potential energy?

Correctly round the following number to the ten thousandths place 3.68274

When a lump of uranium is broken into smaller pieces, the total surface area of the lump A. dreases B. remais the same C. increases

Choose the most acidic substance in the group. lemon juice, pH = 2.25 orange juice, pH = 3.75 milk, pH = 6.6 seawater, pH = 8

A 15,000-kg train car moving due east at 23 m/s collides with and couples to a 10,000-kg train car that is initially at rest. Find the common velocity of the two-car train after the collision. (East is defined as positive.

Why are red stars cooler than blue stars?

The blood plays an important role in removing heat from th ebody by bringing the heat directly to the surface where it can radiate away. nevertheless, this heat must still travel through the skin before it can radiate away.

What is most likely happens during a chemical change

A dart is inserted into a spring-loaded dart gun by pushing the spring in by a distance. For the next loading, the spring is compressed a distance. How much faster does the second dart leave the gun compared with the first

The spinning of earth on its axis causes the apparent rising and setting of the

20 m/s can be an answer for velocity true or false