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.

The correct answer will be option-B.

Explanation:

The scientific experiments are performed to study the hypothesis and prove it.  The scientific factor to be studied in the experiment are known as the "variables". The variables can be "independent variables" which can control and changed, "dependent variables" which remains constant and to be studied and control variables which are kept constant in the experiment.

In the given question, the experiment is performed to study the effect of "loud noise" on the growth of plants so the dependent variable is plant growth dependent on loud noise. Since the same amount of water is provided to each plant will be a controlled variable.

Thus, Option-B is the correct answer.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force