Answer:
Independent variable: CALCULATOR
dependent variable: SPEED AT SOLVING LONG DIVISION PROBLEMS
controlled variable: SAME GRADES, SAME PROBLEM
Explanation:
Independent variable is the variable that is changed or manipulated by the experimenter in an experiment. In this experiment, the independent variable is the CALCULATOR, which was changed in the experiment.
Dependent variable is the variable that is measured in the experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the SPEED AT SOLVING LONG DIVISION PROBLEMS.
Controlled variable or constants are variables that are kept unchanged for all groups throughout the experiment. In this experiment, the controlled variables are: SAME GRADES, SAME DIVISION PROBLEM
C is the answer, enzymes increase the rate of chemical reactions in a cell.
Answer:
ok are you an army BTS Army
Answer:
Refraction:
When ray of light passes through from one medium to another medium ,due to the difference in medium index ,the light deflect from its original path .This deflection of light ray from its path is called refraction.The phenomenon of refraction can also be observed in sound and water waves.
Cornea reflect the light before light reaches to the retina.Cornea is a transparent part and which place in front of the eye.
The irises of cow look brown that is why the eye of cow looks brown.But the irises of man can be different type like brown,green blue etc.