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4 years ago

Two charges that are 2 meters apart repel each other with a force of 2 x 10-5 newton. If the distance between the charges is

1 answer:

7 0

The force of attraction / repultion of two charges is given by F = KQ1Q2 / d^2; where K is the Coulumbs constant, Q1 is the charge on charge 1, Q2 is the charge on charge 2, d is the distance of the two chardes apart.

Thus,
KQ1Q2 / 4 = 2 x 10^-5
KQ1Q2 = 4 x 2 x 10^-5 = 8 x 10^-5

When the distance between the charges was reduced to 1 meter.
F = KQ1Q2 / d^2 = 8 x 10^-5 / 1^2 = 8 x 10^-5

Therefore, option C is the correct answer.

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Using two billiard balls, in 3-4 sentences, design an experiment to demonstrate the law of conservation of momentum.

kolezko [41]

Answer:

In the explanation

Explanation:

Experiment:

Consider two billiard balls of masses ‘m₁’ and ‘m₂’, moving with velocities ‘u₁’ and ‘u₂’, respectively, such that u₁ is greater than u₂. After some time, these balls collide with each other and their velocities become ‘v₁’ and ‘v₂’, respectively.

Observation:

The masses of balls should be measured and their initial and final velocities should be measured.

Result:

In order to prove law of conservation of moment following equation must be satisfied by observed values:

$Total\ Momentum\ Before\ Collision = Total\ Momentum\ After\ Collision\\\\m_{1}u_{1} + m_{2}u_{2} = m_{1}v_{1} + m_{2}v_{2}$

4 0

3 years ago

Some tip to heal up eyes?

Lady bird [3.3K]

Answer:

DO rinse your eye with saline solution or clean water. ...

DO blink. ...

DO pull your upper eyelid over your lower eyelid. ...

DO wear sunglasses. ...

DON'T rub your eye. ...

DON'T touch your eye with anything. ...

DON'T wear your contact lenses. ...

DON'T use redness-relieving eye drops.

8 0

4 years ago

Read 2 more answers

A futuristic train rushes past you at an incredible, relativistic speed such that it appears to only be 80% as long as you know

Fed [463]

Answer:

v = 0.6c = 1.8 x 10⁸ m/s

Explanation:

From Einstein's theory of relativity, we know that the length of an object contracts while traveling at a speed relative to speed of light. The contraction is according to following equation:

$L = L_{0}\sqrt{1 - \frac{v^2}{c^2}}$

where,

L = Relative Length

L₀ = Rest Length

According to given:

L = 0.8 L₀

c = speed of light = 3 x 10⁸ m/s

v = relative speed of train = ?

Therefore,

$0.8L_{0} = L_{0}\sqrt{1 - \frac{v^2}{c^2} } \\\\0.8 = \sqrt{1 - \frac{v^2}{c^2} }$

squaring on both sides:

$0.64 = 1-\frac{v^2}{c^2}\\\\\frac{v^2}{c^2} = 1-0.64 \\v^2= 0.36c^2\\$

taking square root on both sides:

v = 0.6c = 1.8 x 10⁸ m/s

3 0

3 years ago

Scientific models can be used for a variety of different purposes. Which of the following is not a possible use for a scientific

alex41 [277]

Options a to c can be the reasons for scientific models.

But to primarily answer scientific questions,that would require an empirical and experimental approach and not use of models.

Though after getting the answers, models can be built to further explain the answers.

d. answer scientific questions.

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4 years ago

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In astronomy which planet spins slowest on its axis

sertanlavr [38]

Venus - 4 miles per hour

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3 years ago