Explain how machines can be useful if the output work is always less than the input work

1.) if you are sitting still are you accelerating? How do you know? 2.) you're on a skateboard, moving very fast but at a constant speed. are you accelerating? 3.) Lara claims that if an object is accelerating it must be moving.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

What happens to the density of a gas when it is compressed? - the density does not change -the density increases -the density decreases

What hazard is associated with ionizing radiation? It causes radiation sickness as a result of any exposure. It undergoes radioactive decay, which can damage DNA in cells.

What is average velocity?

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Suppose you are an observer standing on the Moon, looking back at Earth. If the moon is in the waxingquarter phase, what phase of the Earth would you see? A. waxing quarter B. full C. new D. waning quarter E. none; the Earth doesn't have phases

How many chromosomes will an elephant's sperm have?