All engines operate at less than 100 percent efficiency because they

A. absorb heat

B. conduct heat

C. burn gasoline

D. emit heat

You kick a soccer ball with a speed of 18 m/s at an angle of 43°. How long does it take the ball to reach the top of its trajectory?

When push-starting your car, what is the 3rd Law partner to the friction force you exert on the ground? A) The horizontal force you exert on the car. B) The normal force you exert on the ground. C) The normal force the ground exerts on you.

Calculate the number of millimeters in 2.13 kilometer.

A unit for measuring frequency is? ohm watt ampere hertz

About how much pressure do the feet of a 6000 kg elephant exert on the ground assuming each foot has an area of 0.10 square meter

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?

The process of changing the energy of a system by means of force. Force * Diatance

A gnat takes off from one end of a pencil and flies around erratically for 18.6 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 7.15 meters, and the pencil is 6.