You have decided to study the effect of loud noise on plant growth. you put one plant in a quiet room and the other plant in your school's band hall. providing each plant with the same amount of water is an example of a
a. data.
b. control.
c. variable.
d. observation.

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.

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

What is the temperature in degrees celsius of a substance with a tempature of 49k