Is energy measured in joules

The steam engine in a train heats water until it becomes steam. The steam pushes pistons to move the train. The train is changing a. kinetic energy b. heat c. chemical energy into a. mechanical energy b. potential energy c. electricity?

What is the significance of Einstein's famous equation E = mc2? Energy is not related to mass. Mass can be destroyed. Energy can be destroyed. Mass and energy can convert to one another.

What is true about all uranium atoms? they each have the same number of nuclear particles. they each have the same number of neutral particles. they each have the same number of neutrons. they each have the same number of protons.?

There have been books written about how blood type affects personality or body shape. Knowing that blood type is determined by antigens on erythrocytes, are these claims scientifically valid? O True O False

A car traveling at 4.0 m/s has a constant acceleration of 2.0 m/s2. after 3.0 seconds, the average velocity during the acceleration is

List three machines or devices that depend on gravity to work.

Daily summer solar radiation levels at polar latitudes are caused by the high intensity of radiation per unit surface area rather than by long periods of daylight.

Predict whether the hottest part of a room will be near the ceiling, in the center, or near the floor, given that there is a hot-air vent near the floor.

Does light always travel at the same speed?

Four identical 2500 kg objects are at the corners of a square with 12m side what is the distance between A and B