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3 years ago

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Why Is it important to have a control group in an experimental investigation

1 answer:

11Alexandr11 [23.1K]3 years ago

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It is important to have a control group in an experimental investigation because if the experiment did not have the control group the data collected would not be accurate. For example if you're testing water turning into ice but you use a different freezer or ice tray for each experiment then there are some elements that would make your data inaccurate.

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What is the total energy of a particle with a rest mass of 1 gram moving with half the speed of light? 1 eV = 1.6 x 10^-19 J. An

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Answer:

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Explanation:

mass of particle, mo = 1 g = 0.001 kg

velocity of particle, v = half of velocity of light = c / 2

c = 3 x 10^8 m/s

Energy associated to the particle

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1 eV = 1.6 x 10^-19 J

So, $E=\frac{1.04\times10^{14}}{1.6\times10^{-19}}=6.5\times10^{32}eV$

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