A pair of scissors is a first class lever. The fulcrum is between the handle and the blades. The blades contain two simple machines back to back: they are

A) gears.

B) levers.

C) inclined planes.

D) wheel and axles.

Must the total energy of a system be conserved whenever its momentum is conserved? Explain why or why not.

What are two things made up of Atoms?

Which of the following is an important property of stars, because it provides some information about the temperature of a star? Group of answer choices The shape of the star The distance to the star The star's color The star's name

Explain how drinking through a straw illustrates fluid flowing from high-pressure to low-pressure areas.

Assume that you land at an airport with the altimeter set to 29.92 instead of the current setting of 30.00. What will the altimeter read if the field elevation is 2,000 feet MSL?

An object starts from rest at time t = 0.00 s and moves in the + x direction with constant acceleration. The object travels 14.0 m from time t = 1.00 s to time t = 2.00 s. What is the acceleration of the object? a) 5.20 m/s^2 b) 10.4 m/s^2 c) 8.

A box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. What is the frictional force between the box and the surface?

What is a wormhole, and how is it formed?

Most cells cannot harness heat to perform work because

7 factors that can affect physical fitness