how much chemical energy must be supplied to a car engine if we want it to produce 5000J of kinetic energy and it is 45% efficient

What is the difference between washing of clothes at home and washing by dry cleaning at laundry

Which of the following statements are true? Check all that apply. 1. The Sun is located at one of the foci of the planets' elliptical orbits. 2. The path of the planets around the Sun is elliptical in shape. 3.

Albert views henry moving by at a constant velocity. henry has a light clock and also a stopwatch which were synchronized when at rest.

A proton is released in a uniform electric field, and it experiences an electric force of 2.36*10-14 N toward the south. (a) What is the magnitude of the electric field? (b) What is the direction of the electric field?

A 2kg object is moving horizontally with a speed of 4 m/s. how much force is required to keep the object moving at this speed and in this direction? explain.

Describe a process that converts chemical energy to thermal energy

A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. Since a lot of damage is done on the car : Select one: a. the force on the truck is smaller than the force on the car. b.

Acceleration can be best described as: The ability of an object to stay still. The ability of an object to speed up. The ability of an object to stop. The ability of an object to slow down.

A carnot engine rejects 80 mj of energy every hour by transferring heat to areservoir at 10°c. determine the temperature of the high-temperature reservoir and the power produced if the rate of energy addition is 40 kw.

When monochromatic light passes through the interface between two unknown materials at an angle θ where 0∘<θ<90∘, no changes in the direction of propagation of light are observed. What can be said about the two materials? A.