A reaction that releases heat is what

3. How are fossil fuels used to generate electrical energy? A Heat from burning fuel spins magnets inside an electric motor. B Heat from burning fuel creates steam that spins a turbine. C Heat from burning fuel creates steam that turns a transformer.

Sam and Ben stand on either side of box. They use equal force to push on the box. They observe the box does not move. How did they get this result? A) Balanced forces do not affect an object's motion.

What is a chromosome made of?

At what angle North of East must the ship travel to reach its destination? Let East be 0◦ and North 90◦.

Which most likely indicate a chemical change has occurred?

A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Assume that any other unbalanced forces are negligible. What is the speed of the wreckage just after the collision?

What is the spine also known as

If a man has a mass of 74 kilograms runs 800 meters in 150 seconds, what is his average momentum?

Two lamps one rated 40W at 220 V and the other 60W at 220 V are connected in parallel to the electric supply at 220V.

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevator?