Almost all of the electricity that people use is

produced by

1. motors.

2. batteries.

3. transformers.

4. generators.

1. What is the difference between mass and weight?

Which of the following are true about mass? check all that apply a) Mass changes as distance from the center of the planet changes. b) Mass determines how much an object will accelerate in response to an applied force.

Bikes come in 5 different colors the bike shack order 45 bikes they order the same number of bikes in each color. how many bikes do they of each color

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 222J of energy to the room? Joules

a car takes 1.2 minutes to travel around a track with a radius of 12 meters what is the tangentiavelocity of the car?

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

What is the force of gravity acting on a 2000-kg spacecraft when it orbits two Earth radii from the Earth's center (that is a distance r=6380 km above the Earth's Surface. The mass of the Earth is 5.98 x 1024 kg.

An LC circuit has a 6.00 mH inductor. The current has its maximum value of 0.570 A at t = 0s. A short time later the capacitor reaches its maximum potential difference of 66.0 V. What is the value of the capacitance?

The first law of thermodynamics states that ΔE = Q - W. Is this also a statement of the principle of conservation of energy? Yes, the heat added and the change in internal energy of the gas equal the work done by the piston.

How can we calculate the density of a sustance that has irregular volume