When you pull on the pulley with a force of 120 n, the pulley applies a force of 800 n to the boxes. what is the mechanical advantage of the pulley?

What gas is released when you burn coal with high amounts of sulfur in it?

Which statement about ocean surface currents is false? A) They have no effect on air temperature over land on the coast. B) They move heat and water between equatorial regions and polar regions. C) They flow in large gyres in the major ocean basins.

Scientists think that about 245 million years ago, the continents were joined in a single landmass known as Gondwana. True or False?

What feature on the periodic table separates the metals and non metals?

An object at rest has no net force acting on it. a. True b. False

In longitude waves, the medium moves parallel to the direction of energy transport

Thomsonâs experiment is credited with the discovery of which particle?

When you drop a pebble from height h, it reaches the ground with kinetic energy k if there is no air resistance. from what height should you drop it so it will reach the ground with twice as much kinetic energy?

Explain two ways that technology has had a positive impact on the environment and two ways that it has had a negative impact on the environment.

A rockets initially at rest, it steady gains speed at a rate of 10m/s^2 for 4.6s during take off. What was the rocket's top speed?