2 years ago

What is a control,constant, independent variable, and a dependent variable in a science experiment?

1 answer:

7 0

A control is something you don't touch/change in a exprement, a constant is the same as the control, the independent is the one the you do vhange, the dependet is the one that you observe/ use your 5 sences with.

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A simple pendulum is used to determine the acceleration due to gravity at the surface of a planet. The pendulum has a length of

SVEN [57.7K]

Answer:

Acceleration due to gravity is 20 $m/sec^2$

So option (E) will be correct answer

Explanation:

We have given length of the pendulum l = 2 m

Time period of the pendulum T = 2 sec

We have to find acceleration due to gravity g

We know that time period of pendulum is given by

$T=2\pi \sqrt{\frac{l}{g}}$

$2=2\times 3.14 \sqrt{\frac{2}{g}}$

$0.3184= \sqrt{\frac{2}{g}}$

Squaring both side

$0.1014= {\frac{2}{g}}$

$g=19.71=20m/sec^2$

So acceleration due to gravity is 20 $m/sec^2$

So option (E) will be correct answer.

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2 years ago

What is hypothesis testing

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Hypothesis testing is basically testing the results of a experiment to see weather your results are valid or not.

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What effect does observing a substance s physical properties have on the substance

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It can be observed without changing the identity of the object.

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A ____________ sloped line means the object is returning to the starting point. A Upward B Backwar C Missing D Downward

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Answer:

A downward sloped line means the object is returning to the starting point.

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Who was the first to hypothesize that electron orbit a positively charged nucleus

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