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3 years ago

Work is a product of ___________.

Physics

2 answers:

swat323 years ago

6 0

hey buddy here is your answer:

work is a product of <u><em>force and distance</em></u>

explanation:

according to physics,work is said to be done when there is displacement in the direction of force

si unit:joule(j)

alexgriva [62]3 years ago

4 0

The correct option is D

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3 years ago

A train 471 m long is moving on a straight track with a speed of 75.1 km/h. The engineer applies the brakes at a crossing, and l

hram777 [196]

Answer:

$t = 37.6 s$

Explanation:

As we know that train is initially moving with the speed

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now we know that

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$v_f = 4.17 m/s$

now we can use kinematics here

$v_f^2 - v_i^2 = 2 a d$

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$4.17 - 20.86 = a(-0.44)$

$t = 37.6 s$

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3 years ago

A certain type of laser emits light that has a frequency of 4.2 × 1014 Hz. The light, however, occurs as a series of short pulse

bogdanovich [222]

Explanation:

It is given that,

Frequency of the laser light, $f=4.2\times 10^{14}\ Hz$

Time, $t=3.2\times 10^{-11}\ s$

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$\lambda=\dfrac{c}{f}$

$\lambda=\dfrac{3\times 10^8}{4.2\times 10^{14}}$

$\lambda=7.14\times 10^{-7}\ m$

$\lambda=714\ nm$

(b) Let n is the number of the wavelengths in one pulse. It can be calculated as :

$n=f\times t$

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Hence, this is the required solution.

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Answer:

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3 years ago

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