The simple machines usually increase work output compared to work input.

A. True

B. False

A scientist wants to test ways to reduce pollution in lake. What is the bestway of doing this

A woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210 m from the deer.

A rock is projected from the edge of the top of a building with an initial velocity of 21.6 m/s at an angle of 37◦ above the horizontal. The rock strikes the ground a horizontal distance of 95 m from the base of the building.

How do scientist learn about stars and galaxies even tough humans have never been there?

Do you think the humans will always destroy the commons (water, land, etc.) that they share? why or why not?

Two bullets have masses of 3.1 g and 4.4 g, respectively. Each is fired with a speed of 42.0 m/s. a) What is the kinetic energy of the first bullet? Answer in units of Jb) What is the kinetic energy of the second bullet?

What kind of energy does a light bolt have?

What renewable source would be affected by cloud clover

The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information? a.

Does light speed up or slow down when it travels from air to liquid