A boy and girl on ice skates face each other. the girl has a mass of 20 kg and the boy has a mass of 30 kg. the boy pushes the girl backward at a speed of 3.0 m/s as a result of the push the speed of the boy is

An object moving north with an initial velocity of 14 m/s accelerates 5 m/s2 for 20 seconds. What is the final velocity of the object

What happens to rocks as water combines with gases in the air to form acids? A. The acid dissolves or alters the chemical composition of the rock. B. The acid solidifies any loose rock particles, which makes the rock denser. C.

A dairy farmer notices that a circular water trough near the barn has become rusty and now has a hole near the base. The hole is 0.38 m below the level of the water that is in the tank.

A light-year is: a. the distance light travels in one year b. about 19 trillion miles c. based on the distance from the earth to the sun d. all of the above

The rate constant for a certain reaction is k = 6.30*10-3 s-1. If the initial reactant concentration was 0.500 M, what will the concentration be after 19.0 minutes? Express your answer with the appropriate units.

The Amazon River is in Europe. True or False

A microwave oven operating at 120 volts is used to heat a sandwich if the oven draws 12.5 amperes of current for 45 seconds what is the power dissipated by the oven?

Which of the transformers are step-up transformers? Which of the transformers are step-down transformers?

1 A plane moving at 30m/s drops a load 200m down to the ground. How long did it take to hit the ground.

Can a body be in equilibrium if it is in motion? Explain