What part of the microscope controls how much light is allowed to pass through

The waste products of combustion leave the internal combustion engine through the: A. crankshaft, B. exhaust valve. C. cylinder. D. intake valve.

What is the difference between work input and work output

Asteroids were recently formed by the collision and breakup of an object orbiting in the asteriod belt. a. True b. False

Do atoms with the same outer level electrons pattern have similar properties

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 441J of energy to the room?

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz

A measure of how much pulling, or tension, a material can withstand before breaking is - A. hardness. B. brittleness. C. tensile strength. D. malleability.

How work done against gravity can be expressed?

An electron is acted on by two electric forces, one of 2.7*10-14 N acting upward and a second of 5.8*10-14 N acting to the right. What is the magnitude of the electric field at the electron's location?