7 What is the difference between the velocity and the speed of an object? A Velocity is the change in distance over time, while speed is the change in velocity
over time.
B Velocity has a direction associated with it, while speed has no specific direction.
C Velocity has no direction associated with it, while speed has a specific direction.
D Velocity is the change in speed over time, while speed is the change in distance over
time.

Found this on google, "Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes."

The answer to your question is D)D Velocity is the change in speed over time, while speed is the change in distance over. Sorry if i am incorrect.

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ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

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.