2 years ago

Why are simple machines important?

Physics

2 answers:

kobusy [5.1K]2 years ago

6 0

Simple machines are important because without them we wouldn’t have had the foundation for all the newer inventions

zepelin [54]2 years ago

4 0

Explanation:

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What is the momentum of a .005kg bumble bee that is traveling at a velocity of 3.0m/s?

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2 years ago

Coherent light of wavelength 540 nm passes through a pair of thin slits that are 3.4 × 10-5 m apart. At what angle away from the

Scrat [10]

Answer: $1.8\°$

Explanation:

The diffraction angles $\theta_{n}$ when we have a slit divided into $n$ parts are obtained by the following equation:

$dsin\theta_{n}=n\lambda$ (1)

Where:

$d=3.4(10)^{-5}m$ is the width of the slit

$\lambda=540 nm=540(10)^{-9}m$ is the wavelength of the light

$n$ is an integer different from zero.

Now, the second-order diffraction angle is given when $n=2$ , hence equation (1) becomes:

$dsin\theta_{2}=2\lambda$ (2)

Now we have to find the value of $\theta_{2}$ :

$sin\theta_{2}=\frac{2\lambda}{d}$ (3)

Then:

$\theta_{2}=arcsin(\frac{2\lambda}{d})$ (4)

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Finally:

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2 years ago

It took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 km/h. How far did the train travel

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