a body whose mass is 40kg runs up a flight of 30steps, each 150mm high in 6 seconds. Find the average power developed

Candle wax gradually loses its shape as it is heated. What type of solids is candle wax. Explain

The length of a sheet of U. S. standard (letter size) paper is closest to: a. 8 centimeters b. 11 centimeters c. 29 centimeters d. 300 centimeters

An elementary particle of mass m completely absorbs a photon, after which its mass is 1.01m. (a) what was the energy of the incoming photon? (b) why is that energy greater than 0.01mc2?

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

Metallic bonding generally occurs between

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.