Why is there always some waste heat in a heat engine?

If four different types of vehicles have the same kinetic energy when traveling on a highway what can you infer about their speeds?

Which properties should an object, system, or process have in order for it to be a useful standard of measurement for a physical quantity such as length or time?

Which description indicates that a question is nonscientific?. A. The question has a narrow focus ... B. They question leads to a testable hypothesis ... C. The question addresses a gap in knowledge ... D.

A mango fruit drops from the top of it's tree which is 40 m. How long does it takes to reach the ground

A truck, initially traveling at a speed of 22 meters per second, increases speed at a constant rate of 2.4 meters per second2 for 3.2 seconds. what is the total distance traveled by the truck during this 3.2-second time interval?

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences

A girl is walking 2km north them east then south then west whar is her displacement

Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the + x axis.

A smaller unit of volume than a milliliter would be a microliter. A microliter is one-millionth of a liter. Select one: a. True b. False