3 years ago

Evaluate the importance of having a control group in a scientific investigation. help plzzz

1 answer:

7 0

The importance of having a control group is to see how much your other test subjects changed. You use the control to compare.

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3 years ago

In a closed system, _____ energy is equal to potential energy plus kinetic energy.

OlgaM077 [116]

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3 years ago

What NE describes the way energy is stored inside atoms

drek231 [11]

Answer:

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N:nuclear

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2 years ago

What is an astronomical unit (AU)?

avanturin [10]

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3 years ago

A capacitor is constructed of two large, identical, parallel metal plates separated by a small distance d. A battery fully charg

Alja [10]

The capacitance of a capacitor of a parallel plate is given by:

$C=\frac{kA\cdot\epsilon_o}{d}$

Where:

$\begin{gathered} \epsilon_o=_{\text{ }}Vacuum_{\text{ }}permittivity \\ k=_{\text{ }}Dielectric_{\text{ }}constant=2 \\ A=_{\text{ }}Area_{\text{ }}of_{\text{ }}the_{\text{ }}plates \\ d=_{\text{ }}distance_{\text{ }}betwen_{\text{ }}the_{\text{ }}plates \end{gathered}$

We also know:

$\begin{gathered} Q=\frac{q}{V} \\ so\colon \\ \frac{q}{V}=\frac{kA\cdot\epsilon_o}{d} \\ V=\frac{qd}{kA\cdot\epsilon_o} \\ if \\ k=2 \\ V=\frac{1}{2}(\frac{qd}{kA\cdot\epsilon_o}) \end{gathered}$

As we can see the voltage halves

And since:

$\begin{gathered} E=\frac{V}{d} \\ W=qV \end{gathered}$

We can conclude that electric field and also the energy halve

5 0

1 year ago