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3 years ago

If a 25 kg lawnmower produces 347 w and does 9514 J of work, for

Physics

1 answer:

Igoryamba3 years ago

6 0

Steps 1 and 2)

The variables are W = work, P = power, and t = time. In this case, W = 9514 joules and P = 347 watts.

The goal is to solve for the unknown time t.

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Step 3)

Since we want to solve for the time, and we have known W and P values, we use the equation t = W/P

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Step 4)

t = W/P

t = 9514/347

t = 27.4178674351586

t = 27.4 seconds

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Step 5)

The lawn mower ran for about 27.4 seconds. I rounded to three sig figs because this was the lower amount of sig figs when comparing 9514 and 347.

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Note: we don't use the mass at all

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Answer:

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2 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

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Answer:

The frequency is $f = 439.5 \ Hz$

Explanation:

From the question we are told that

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

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Generally the beat frequency is mathematically represented as

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

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3 years ago

Early black-and-white television sets used an electron beam to draw a picture on the screen. The electrons in the beam were acce

lutik1710 [3]

Answer:

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voltage = 3 kV

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and

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Answer:

See below

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