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vladimir1956 [14]

2 years ago

12

To heat the house, the boiler transfers 15 MJ of energy in 10 minutes.

1 answer:

Harrizon [31]2 years ago

8 0

The formula is P = E/t, where P means power in watts, E means energy j , and t means time in seconds. This formula states that power is the consumption of energy per unit of time.

P = 15 M / 10*60

M = mega = 10⁶

15 *10⁶ / 600

= 25000 watt

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baherus [9]

${\mathfrak{\underline{\purple{\:\:\: Given:-\:\:\:}}}} \\ \\$

$\:\:\:\:\bullet\:\:\:\sf{Mass \ of \ the \ body \ (m) = 40 \ kg}$

$\:\:\:\:\bullet\:\:\:\sf{Final \ velocity \ of \ the \ body \ (v) = 20 \ m/s}$

$\:\:\:\:\bullet\:\:\:\sf{Initial \ velocity \ of \ the \ body \ (u) = 0}$

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${\mathfrak{\underline{\purple{\:\:\:To \:Find:-\:\:\:}}}} \\ \\$

$\:\:\:\:\bullet\:\:\:\sf{Force \ exerted \ by \ the \ body \ ( F)}$

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${\mathfrak{\underline{\purple{\:\:\: Solution:-\:\:\:}}}} \\ \\$

☯ <u>Using 1st equation of motion </u>

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$\dashrightarrow\:\: \sf{v = u + at}$

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$\dashrightarrow\:\: \sf{20 = 0 + a(4)}$

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$\dashrightarrow\:\: \sf{20 = 4a}$

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$\dashrightarrow\:\: \sf{\dfrac{\cancel{20}}{\cancel{4}} = a}$

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$\dashrightarrow\:\: \sf{a = 5}$

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☯ <u>Now, Finding the force exerted </u>

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$\dashrightarrow\:\: \sf{F = ma}$

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$\dashrightarrow\:\: \sf{F = 40 \times 5}$

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☯ <u>Hence</u>, $\\$

$\:\:\:\:\star\:\:\:\sf{The \ force \ exerted \ by \ the \ body \ is \ 200N}$

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Anvisha [2.4K]

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