Which tool would you use to measure how long it takes a toy car to go down a ramp?

a. ruler

b. scale

c. stopwatch

d. meterstick

Option C only measures time, option C is the correct answer.

Explanation:

Here we need to find which tool would you use to measure how long it takes a toy car to go down a ramp.

Here the unknown is time.

In the given options let us find what they measures.

  a) Ruler - Measures distance

  b) Scale - Measures distance

  c) Stopwatch - Measures time

  d) Meter stick - Measures distance

So option C only measures time, option C is the correct answer.

These people were important in the development of the atomic theory:  John Dalton, J.J. Thomson, Ernest Rutherford and Robert Millikan

Explanation:

And also there is this website that lists people and what they did and when they did it. The name of that website is: https://atomictimeline.net/

Hope this helped!!