Define efficiency in your own words

In a Do‑Nothing Machine, two sliders are confined to perpendicular channels and are connected by a rod. The rod can be rotated, causing the sliders to move back and forth in their respective channels.

How many atoms of hydrogen are represented by the formula: A) 1 B) 4 C) 8 D) 28

When 68 j of energy are added to a sample of gallium that is initially 25c, the temperature rises to 38c. what is the volume of the sample?

A pilot wishes to fly on a course of 290° with an air speed of 300 knots when the wind blows from 224° at 18 knots. Find the drift angle to the nearest hundredth of a degree. a) 3.18 degrees b) 5.07 degrees c) 86.82 degrees The answer is 3.

What is the until of measure for speed?

Wood is an example of a fossil fuel. User: The type of energy stored by fossil fuels such as coal is a. kinetic energy. b. mechanical energy. c. chemical potential energy. d. electromagnetic energy. User: An example of a fossil fuel is a. wood. b.

What type of changes does erosion cause? A physical B chemical C electrical D magnetic

Which of the following will exert a force on a magnet? another magnet a nearby piece of glass a nearby piece of plastic a nearby electric current

The rate at which light energy is radiated from a source is measured in which of the following units? A. Lumen B. Candela C. Lux D. Angstrom

Which type of energy makes up most of the internal energy of a solid substance? A. Kinetic energy from translation B. Kinetic energy from rotation C. Kinetic energy from vibration D. Potential energy from intermolecular forces