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3 years ago

Which of these is the best explanation for why two negatively charged balloons, if put close, will repel?

1 answer:

6 0

I cannot see your options, but my best guess is that the same charges repel, and different charges attract. If one of the balloons was positively charged, they'd attract, but because both of them are negative, then they repel. If that's not an option then let me know and I can edit my answer :)

I hope this helps!

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A 50kg meteorite moving at 1000 m/s strikes Earth. Assume the velocity is along the line joining Earth's center of mass and the

zysi [14]

As per the question, the mass of meteorite [ m]= 50 kg

The velocity of the meteorite [v] = 1000 m/s

When the meteorite falls on the ground, it will give whole of its kinetic energy to earth.

We are asked to calculate the gain in kinetic energy of earth.

The kinetic energy of meteorite is calculated as -

$Kinetic\ energy\ [K.E]\ =\frac{1}{2} mv^2$

$=\frac{1}{2}50kg*[1000\ m/s]^2$

$=\frac{1}{2}50* 10^{6}\ J$

$=25*10^6\ J$

Here, J stands for Joule which is the S.I unit of energy.

$Hence,\ the\ kinetic\ energy\ gained\ by\ earth\ is\ 25*10^6\ J$

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3 years ago

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VashaNatasha [74]

Answer:

Explanation:

it is faster at the equator

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2 years ago

Which planet moves the fastest and which planet moves slowest? a, b, c, d, e, or f. Explain

Alisiya [41]

D is the point where the planet moves the fastest. This is because it is in the perihelion, where the planet is moving at it’s fastest pace

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2 years ago

Two hikers are 15 miles apart and walking toward each other. They meet in 2 hours. Find the rate of each hiker if one hiker walk

Marat540 [252]

Answer:

1- 2.6 mph

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Explanation:

See attachment

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3 years ago

A circuit consists of an ideal ac generator, a capacitor, and an ideal inductor, all connected in series. The charge on the capa

Serjik [45]

Answer:

$-16\omega sin(\omega t + \pi/4)$

Explanation:

The function of the current with respect to time is the derivative of the charge function with respect to time t. We can apply chain rule to differentiate it:

$I(t) = Q'(t) = (16cos(\omega t + \pi/4))' \\= -16(\omega t + \pi/4)' sin(\omega t + \pi/4) \\= -16\omega sin(\omega t + \pi/4)$

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3 years ago

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