Dependent variable, depending on the argument that we change the variable is changing variable. For Example; Milk degradation, we want to observe the effect of temperature controlled experiment. The same brand, same amount, the same air environment
Answer:
Each magnet should have been tested on many different magnetizable materials
Explanation:
In designing an experiment such as that outlined above, the experimental design should have included many different magnetizable materials.
All the types of magnets; the horseshoe, the bar, and the ring magnet should have been tested using many different magnetizable materials apart from the metal object. By so doing, the strongest magnet can be effectively determined without bias because it will attract the greatest number of magnetizable materials.
Again, the shape of the magnet affects its ability to attract objects. Hence, different shapes of magnets can not effectively be compared for relative magnetic strength.
Answer:
A. Gas atoms subjected to electricity emit bright lines of light
Explanation:
When subjected to electricity, the electrons of a gas atom are <em>excited</em>. From that excited energy level, the electrons eventually go back to their initial state; this <u>transition</u> is done by emitting photons at a specific wavelength (causing an emission of bright lines of light).
Such is the mechanism of gas-discharge lamps tipically found in households.
