Do you think most other people participate in these measures? why or why not?

Apossible explanation for a set of facts that can be tested by further investigation is called

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

When an object is heated it contracts. a. true b. false