3 years ago

What is 7.4×10 to the second power

Physics

1 answer:

sleet_krkn [62]3 years ago

8 0

The correct answer is 740

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kipiarov [429]

Answer:

Explanation:

If the object is moving at a constant speed, the object isn't accelerating as the velocity doesn't change.

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3 years ago

A spherical drop of water carrying a charge of 42 pC has a potential of 620 V at its surface (with V = 0 at infinity). (a) What

iren [92.7K]

Answer:

0.0006091222 m

Explanation:

q = Charge = 42 pC

V = Voltage = 620 V

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

Electric potential is given by (at r = R)

$V=\dfrac{q}{4\pi\epsilon R}\\\Rightarrow R=\dfrac{q}{4\pi\epsilon V}\\\Rightarrow R=\dfrac{42\times 10^{-12}}{4\pi\times 8.85\times 10^{-12}\times 620}\\\Rightarrow R=0.0006091222\ m$

The radius of the drop is 0.0006091222 m

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3 years ago

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Vadim26 [7]

Background research.

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3 years ago

Audio frequency range of a human ear is 20Hz - 20000 Hz. Express the range in terms of time period ? Answer needed urgently. Pl.

Feliz [49]

Using the term c in this case is a little confusing. It is more generic to use a general velocity, v. That way, in this case, we know to use the speed of sound.

wavelength*frequency=v

wavelength_20Hz = (345 m/s)/(1/20s)

<span>wavelength_20kHz = (345 m/s)/(1/20000s)

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A ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle O to

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180 - (40 * 2) = 100°

So the answer is (D) 100°

Hope this helps! :)

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3 years ago

What is 7.4×10 to the second power​

What is 7.4×10 to the second power