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2 years ago

15

1. Calculate the mechanical advantage of a machine that has an input force of 13 N and

2 answers:

Helga [31]2 years ago

6 0

Answer:

52 N output

Explanation: 65-13=52

lianna [129]2 years ago

3 0

"Mechanical advantage" = (output force) / (input force)

Mechanical advantage of this machine = (65 N) / (13 N)

<em>Mechanical advantage = 5</em>

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Ratling [72]

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3 years ago

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baherus [9]

Answer:

The speed of the baseball is approximately 19.855 m/s

Explanation:

From the question, we have;

The frequency of the microwave beam emitted by the speed gun, f = 2.41 × 10¹⁰ Hz

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The Doppler shift for the microwave frequency emitted by the speed gun which is then reflected back to the gun by the moving baseball is given by 2 shifts as follows;

$\dfrac{\Delta f}{f} = \dfrac{2 \cdot v_{baseball}}{c}$

$\therefore{\Delta f}{} = \dfrac{2 \cdot v_{baseball}}{c} \times f$

Where;

Δf = The change in frequency observed, known as the beat frequency = 3190 Hz

$v_{baseball}$ = The speed of the baseball

c = The speed of light = 3.0 × 10⁸ m/s

f = The frequency of the microwave beam = 2.41 × 10¹⁰ Hz

By plugging in the values, we have;

$\therefore{\Delta f} = 3190 \ Hz = \dfrac{2 \cdot v_{baseball}}{3.0 \times 10^8 \ m/s} \times 2.41 \times 10^{10} \ Hz$

$v_{baseball} = \dfrac{3190 \ Hz \times 3.0 \times 10^8 \ m/s }{2.41 \times 10^{10} \ Hz \times 2} \approx 19.855 \ m/s$

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2 years ago

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Answer:

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Initial pressure at the depth is given as

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Andrej [43]

Answer:

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The correct answer should be

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