Trevor lifts a 10kg box to the top of a cliff which is 20m high, in half an hour, then drops the box over the cliff. How much power did he use to lift the box?

A bowling ball has a mass of 7.0 kg, a moment of inertia of 2.8 ' 10-2 kg*m2 and a radius of 0.10 m. If it rolls down the lane without slipping at a linear speed of 4.0 m/s, what is its angular velocity?

An alpha particle travels at a velocity of magnitude 550 m/s through a uniform magnetic field of magnitude 0.045T. (An alpha particle has a charge of charge of + 3.2 x 10-19 C and a mass 6.

A circuit has a resistance of 2.5 Ω and is powered by a 12.0 V battery. The current in the circuit, to the nearest tenth, is ___A.

What type of energy transfer occurs when: warm ocean water carries heat from the equator toward the poles A - Radiation B - Convection C - Conduction

A sports car accelerates from rest to 26m/s in 4.3s. What is the acceleration of the vehicle

Which Earth system spheres are involved in this particular scientific investigation on hydraulic fracturing? Choose one or more: a. biosphere b. atmosphere c. hydrosphere d. cryosphere e. geosphere

A particle with a charge of 33 μC moves with a speed of 74 m/s in the positive x direction. The magnetic field in this region of space has a component of 0.41 T in the positive y direction, and a component of 0.86 T in the positive z direction.

While floating in space a 100.-kg robot throws a 0.800-kg wrench at 12.0 m/s toward its human partner working on the spaceship. How fast will the robot recoil?

What is the order of magnitude of the speed of light

A car is going 60.0 mi/h and has to stop in 6.0 seconds. What is the car's acceleration?