Which of the following describes the work done by a heat engine?

A. Heat input minus heat output

B. Heat input minus work

C. Heat input plus heat output

D. Heat output minus heat input

Jacques is trying to put a screw into a hard piece of wood, but it is too difficult for him to turn. Which of the following would increase the mechanical advantage of the screw? A. using a screw with threads closer together B.

Which light consists of all the colors of the visible light spectrum?

What is not an example of work, according to the scientific definition?

What happens when light is scattered? A. it reflects on many different directions. B. It bends as it passes from one medium to another. C. It vibrates in only one plane. D. It's is redirected as it passes through a medium.

In free fall the object with less air resistance falls with a greater acceleration

Explain what each of the following scientists contribute to the atomic theory

A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Do the following quantities increase, decrease, or stay the same? Select one or more: a. delta V increases b.

Energy is observed in two basic forms: potential and kinetic. Which of the following correctly matches these forms with a source of energy? a. the heat released from a living organism: potential energy b.

What should you do when operating a boat in large waves and high wind?

A planetary nebula forms when the outer layers are expelled from which type of star?