2 years ago

1. Your car has run out of gas. Fortunately, there is a gas station nearby. You must

Physics

1 answer:

djverab [1.8K]2 years ago

5 0

Explanation:

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Which of the following should a warm up NOT include?

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A motor develops 80 kW of power as it lifts a loaded elevator 20.5 m in 45 s. How much force does the motor exert? *

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Answer:

F=1.3⋅105N

Explanation:

It's common knowledge.

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3 years ago

Benny has 20 jellybeans and wants to share with his friends how many will each friend get? there are 5 friends.

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3 years ago

Humans have 46 chromosomes. The cells created by meiosis have

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3 years ago

When a piano tuner strikes both the A on the piano and a 440 Hz tuning fork, he hears a beat every 2 seconds. The frequency of t

AysviL [449]

Answer:

The frequency is $f = 439.5 \ Hz$

Explanation:

From the question we are told that

The frequency of the tuning fork is $f_t = 440 \ Hz$

The beat period is $T = 2 \ s$

Generally the beat frequency is mathematically represented as

$f_b = \frac{1}{T}$

$f_b = \frac{1}{2}$

$f_b = 0.5 \ Hz$

The beat frequency is also represented mathematically as

$f_b = f_t - f$

Where $f$ is the frequency of the piano

$f = 440 - 0.5$

$f = 439.5 \ Hz$

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3 years ago