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SCORPION-xisa [38]
3 years ago
8

Multiply the number 4.48E-8 by 5.2E-4 using Google. What is the correct answer in scientific notation?

Physics
1 answer:
Oksi-84 [34.3K]3 years ago
8 0

Answer:

2.32\times 10^{-11}

Explanation:

First number is 4.48\times 10^{-8}

Second number is 5.2\times 10^{-4}

We need to multiply the two numbers.

4.48\times 10^{-8}\times 5.2\times 10^{-4}=(4.48\times 5.2)\times 10^{(-8-4)}\\\\=23.296\times 10^{-12}

In scientific notation : 2.32\times 10^{-11}

Hence, this is the required solution.

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A rock is thrown off a 50.0 m high cliff. How fast must the rock leave the cliff top to land on level ground below, 90 m from th
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Answer:

The rock must leave the cliff at a velocity of 28.2 m/s

Explanation:

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r = (x0 + v0x · t, y0 + 1/2 · g · t²)

Where:

r = position vector at time t.

x0 = initial horizontal position.

v0x = initial horizontal velocity.

t = time.

g = acceleration due to gravity (-9.81 m/s² considering the upward direction as positive).

Please, see the attached figure for a graphical description of the problem. Notice that the origin of the frame of reference is located at the edge of the cliff so that x0 and y0 = 0.

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Then, using the equation of the vector position written above:

90 m = x0 + v0x · t

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-50 m = 1/2 · g · t²

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90 m = v0x · t

90 m = v0x · 3.19 s

v0x = 90 m / 3.19 s

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8 0
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A hydraulic turbine is used to generate power by using the water in a dam. The elevation difference between the free surfaces up
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Answer:

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Answer:

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Explanation:

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