5. Randy's scenoe teacher is giving a demonstration to show how a metal reacts with different acids. He places a small piece of the metal in each of three beakers containing a solutions of three different
acids. He adds a plece of the metal to a fourth beaker that contains only water. What is the purpose of
the fourth beaker? 13.N.1.1)
A It ensures that the hypothesis will be correct.
B. It provides more data to include in a lab report.
C. It adds an Independent variable to the experiment.
D. It is the control and serves as the basis for comparison.

talk back to him about the sport and show him your expertise or leave the room

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