What is speed? science

a. time per distance (hours per mile or seconds per meter)

b. distance per time ( miles per hour or meters per second)

c. time ( hours or seconds)

d. distance ( miles or meters)

second questions

which of the following is an example of velocity?

a. 10m/s to the right

b. 10 m/s

c. 10

d. 10 m to the right

Speed is B. Distance per time. An example can be the speed of a car. Let's say that this car is moving at a constant speed of 35 mph. This means that the distance is 35 miles, per hour (time).

Velocity is Speed with direction. In this case, A. 10 m/s to the right is your answer, for it gives distance (10 meters per second), as well as direction (velocity).

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pure substance: iron,copper

impure substance: water,charcoal