If a charge of 2 C passes through a conductor in 4 seconds then how much current is flowing through it?
a
2.0 A
b 0.5 A
С
5.0 A
d 20 A

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

Athermometer to measure the temperature of course 

All three of those things are forms of "acceleration".