Maria drove to the store, did some shopping, and then came home. During Maria's trip, when was her displacement equal to zero? A) 0 hours B) It was never zero. C) at 0 hours and 2 hours D) from. 75 to 1.25 hours

A solid motor has an average thrust of 67,000 N, a specific impulse of 285 sec, and a propellant mass fraction of 0.92. Calculate the total mass of the vehicle for a 42 sec burn time.

Which kind of radio waves are used by television stations to carry sound?

Assume that you stay on the Earth's surface. What is the ratio of the sun's gravitational force on you to the earth's gravitational force on you? Express your answer using two significant figures.

99 percent of the earth's atmosphere by mass is made up of only elements. These elements are A) Carbon and oxygen B) Nitrogen and oxygen C) Hydrogen and oxygen D) Helium and hydrogen

Explain why the dissolution of a crystalline particle in a solution can be speeded up by (a) stirring the solution and (b) by crushing the particle, from a mass transfer perspective.

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?

Does temperature affect the dissolving phase?

In a clear, coherent, paragraph-length answer, explain why the speed of the apple half way between the release and the maximum height is not half the initial speed.

In pea plants Round (R) is a dominant trait and wrinkled nose (r) is a recessive trait. Which combination would result in wrinkled seeds? 1. RR 2. Rr 3. rr 4. ww