Carlos uses one golf ball to set another golf ball in motion. The following diagram
shows how Carlos designs his experiment.
Carlos releases the ball on the string from
different heights. Each time, the first ball
strikes the second ball, which then rolls
down the track. Which force causes the
first ball to swing downward?
A a pull due to gravity
(B a pull from the string
© a push from Carlos's hand
D friction between air and the golf ball
which force causes the first ball to swing downward?

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

what tree

explanation: