When chemical bonds are broken, the process is

A:endothermic

B:exothermic

C:conserved

4. Why is this a double replacement reaction? HCl+Fes - FeCl+H2S

The word atom comes from a Greek word that means "able to duplicate".

What is the sum of 231 + 5080 + 80 + 13 + 9

Reyna kicks a ball, which then rolls across a grassy field. Which is the best explanation for why the ball eventually comes to a stop? A. The force of gravity pulls the ball down into the grass until it can no longer move B.

How does is the terminal velocity of a feather different from the terminal velocity of an egg?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff