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2 years ago

Score

Physics

1 answer:

hammer [34]2 years ago

4 0

Answer:

(a) J = 10560 kg-m/s (b) 251.42 N

Explanation:

Given that,

Mass, m = 4400 kg

Initial speed, u = 5.2 m/s

Final speed, v = 7.6 m/s

Time, t = 42 s

(a) Let J be the impulse exerted on the vehicle. Impuse is equal to the change in momentum such as :

J = m(v-u)

J = 4400 (7.6-5.2)

J = 10560 kg-m/s

(b) Impulse = Force × t

$F=\dfrac{J}{t}\\\\F=\dfrac{10560}{42}\\F=251.42\ N$

Hence, this is the required solution.

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Answer:

The illumination on the book before the lamp is moved is 9 times the illumination after the lamp is moved.

Explanation:

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2 years ago

What amount of heat is required to raise the temperature of 200 g of water by 15°C (the specific heat of water is 1 cal/g°C)

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Answer:

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Explanation:

Find:

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Specific heat of water (C) = 1 cal/g°C

Find:

Heat energy required (Q) = ?

Computation:

Q = M × ΔT × C

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2 years ago

An emf of 22.0 mV is induced in a 519-turn coil when the current is changing at the rate of 10.0 A/s. What is the magnetic flux

zhenek [66]

Answer:

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Explanation:

Given that,

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