If a machine has 100% efficiency, it means that

A. output work is equal to input work.

B. output force is equal to input force.

C. output work is twice the input work.

D. output force is twice the input force.

A defensive stroke where the ball is struck with a downward and forward motion with a short chopping motion

A body is a particular amount of matter. it can be a solid, liquid, or gas. it cam be described as existing in a. time and space b. location and movement c. motion and force d. size and shape

The human body uses chemical energy in food to produce other forms of energy. What are the other forms of energy?

Where are variables represented in a graph?

Write a hypothesis about the effect of increasing resistance on the current in the circuit Use the " then because "format and be sure to answer the losson question: "How do changes in voltage or resistance affect current in an electric circuit?"

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)