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Ganezh [65]
3 years ago
9

Sinusoidal water waves are created 120 km offshore by an earthquake near a small island. observers in helicopters above the isla

nd report that the waves have an amplitude of about 2.0 m, a wavelength of 15 m, and a frequency of about 0.5 hz. how long do lifeguards on the mainland have to evacuate beaches before the waves arrive?

Physics
1 answer:
Helga [31]3 years ago
4 0
Should be about 1hr 13mins

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Mandarinka [93]

Answer:

The magnitude of minimum potential difference is 1800 V

Explanation:

Given:

Electric field E = 3 \times 10^{6} \frac{V}{m}

Gap between electrodes d = 0.060 \times 10^{-2} m

For finding the minimum potential difference,

  \Delta V = E \times d

  \Delta V = 3 \times 10^{6} \times 0.060 \times 10^{-2}

  \Delta V = 1800 V

Therefore, the magnitude of minimum potential difference is 1800 V

8 0
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An object starts at 4m/s and accelerates to 6m/s in 10 seconds. Find its displacement.
Natalka [10]

Answer:

Explanation:

The 2 equations we need here are, first:

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v^2=v_0^2+2aΔx

Solving for acceleration:

a=\frac{6-4}{10}=\frac{1}{5}\frac{m}{s^2} and now we will use that in the other equation:

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36 = 16 + \frac{2}{5}Δx and

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6 0
3 years ago
If the velocity of gas molecules is doubled, then it’s kinetic energy will?( hint formula for kinetic energy is KE=.5 x mv2)
eduard

Answer:

D quadruple

Explanation:

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7 0
4 years ago
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The answer is gravity

Explanation: Hope this helps:)

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Mariulka [41]

Answer:

Yes

Explanation:

The momentum of an object is given by:

p=mv

where

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v is the velocity of the object

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If the elephant is at rest, its velocity is zero:

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so its momentum is also zero:

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6 0
3 years ago
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