April swims 50m north and then turns and swims back to the south. What is her velocity if it takes 60 seconds

A force of 0.2 Newtons is required to slide a book across the table. The book accelerates at 0.11 m/s squared. What is the mass of the box?

A 9.0-V battery moves 20 mC of charge through a circuit running from its positive terminal to its negative terminal. How much energy was delivered to the circuit?

49. If an atom contains 13 protons, then it has (2.4) a. 13 electrons. b. 26 electrons. c. 13 neutrons. d. 26 neutrons,

A tennis player smashes a ball of mass m horizontally at a vertical wall. The ball rebounds at the same speed v with which it struck the wall. Has the momentum of the ball changed, and if so, by how much? A. 4mv B. 0 C. mv D. 0.5mv E. 2mv

What is 2.40 g/cm sinks or floats

A baseball with a mass of 0.8 kg is given an acceleration of 20m/s. how much force was applied to the ball

Stephen can push with 200N of force on a couch. If the couch has a mass of 20 kg, how much acceleration will the couch have?

Which devices might use electromagnets? pick all that apply. 1. audio speakers 2. plastic combs 3. trains 4. doorbells 5. revolving chairs 6. cranes

Match each type of line or symbol, common to geologic maps, to its description. 1. Fault Line A. very dark and thick line 2. Contact Line B. very light and thin line 3. Axis Fold C. look like a stubby T 4. Strike and Dip D.

You drop your backpack out of a window from a height of 8.3 m. What is the impact speed of your backpack? A. 163 m/s B. 1.2 m/s C. 21.3 m/s D. 12.8 m/s