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Changing the length of a pendulum or the mass of its bob has no effect on g; g is a constant, always equal to 9.8 meters per square second near the surface of Earth.
The magnetic force acts only on moving electric charges; A constant electric current produces an unchanging magnetic field and a changing electric current produces a changing magnetic field.
In an experiment, your control variable will not be caused to vary by the experiment. Think of 'cause and effect'. The independent variable is the cause, the result is the effect, and the dependent variable is the one that you leave to be changed by the experiment.
It makes an experiment less objective.
Power dissipated is ( I2 R ).If you triple the voltage across a constant resistance, it will dissipate9 times as much power as it did before the voltage changed.
Controlled experiment. The thing you change is called the independent variable and the constants are the dependent variables. By only changing the independent variable, any results can be attributed to this.
controlled experiment
Because otherwise you would not know what change caused the effect you noticed.
Controlled experiment
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Changing the length of a pendulum or the mass of its bob has no effect on g; g is a constant, always equal to 9.8 meters per square second near the surface of Earth.
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The magnetic force acts only on moving electric charges; A constant electric current produces an unchanging magnetic field and a changing electric current produces a changing magnetic field.
The chemical composition and physical state of substances can change during an experiment.For example two reactants in solid or liquid form can react in an experiment to give a product in a gaseous form.
Blowing up a balloon with a helium tank, then blowing up a different balloon with your mouth will make a difference in the outcome of your experiment. It'll most likely give you more sources of error.
The experimental group is use to compare with the control group, and viceversa. The experimental group is the group that we change the variable to experiment it's effects, as twcontrol group is the'original' experiment's results. Such a when we want to know the effect of changing a variable.
The theory of the heat transfer experiment is the transfer of thermal energy between molecules, due to a temperature gradient. The conclusion of the experiment is that thermal conductivity is much higher in metals and does not change within thickness.