A load of bricks is lifted to the second floor of a building. How do work and power relate to this job?

What are simple machines?

1. When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy. True or False 2. The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True or False 3.

What is transfered by electromagnetic waves?

Match the characteristic or descriptive phrase to the type of application it describes. sound waves soft-tissue imaging electromagnetic wave fetal imaging answer: ultra sound mri mri ultra sound

Contact lenses are designed to be gas permeable in order to allow oxygen to diffuse to the eye. If the edge of a contact lens is double the thickness of the central portion of the lens, how will the diffusion time differ through the different parts

A ""zero-net energy"" building: A. is built using only natural raw materials B. can last longer than a traditional building C. produces as much as or more energy than it uses D. produces less than half the solid waste of a traditional building E.

What's the net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is produced?

What type of force slows you down as you slide across the floor? A. Strong nuclear force B. Friction C. Magnetic force D. Gravity

Scenario A: A ramp is used to lift a refrigerator a height of 12 m with a force of 110 N. The ramp is at an angle of 50° to the ground. Scenario B: A ramp is used to lift a refrigerator a height of 13 m with a force of 120 N.

The sun is 30 degrees above the horizon. it makes a 51 m long shadow of a tall tree. part a how high is the tree?