3 years ago

Why is the sky blue?

Physics

2 answers:

Naya [18.7K]3 years ago

7 0

Molecules in the air scatter blue<span> light from the sun more than they scatter red light.</span>

igomit [66]3 years ago

5 0

Answer:

what he said

Explanation:

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The density of mobile electrons in copper metal is 8.4 1028 m-3. Suppose that i = 4.6 1018 electrons/s are drifting through a co

Vesna [10]

Answer:

The time is 106.7 minute.

Explanation:

Given that,

Density $= 8.4\times10^{28}\ m^3$

Current $i = 4.6\times10^{18}\ electron/s$

Diameter of wire = 1.2 mm

Length = 31 cm

We need to calculate the drift velocity

Using formula of drift velocity

$v_{d}=\dfrac{I}{neA}$

$v_{d}=\dfrac{Ne}{tne\times\pi r^2}$

Put the value into the formula

$v_{d}=\dfrac{4.6\times10^{18}}{8.4\times10^{28}\times\pi\times(0.6\times10^{-3})^2}$

$v_{d}=4.842\times10^{-5}\ m/s$

We need to calculate the time

Using formula for time

$v_{d}=\dfrac{l}{t}$

$t=\dfrac{l}{v_{d}}$

Where, l = length

$v_{d}$ = drift velocity

Put the value into the formula

$t=\dfrac{31\times10^{-2}}{4.842\times10^{-5}}$

$t=6402.31\ sec$

$t=106.7\ minute$

Hence, The time is 106.7 minute.

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3 years ago

Under which conditions are particles in a medium said to be in phase with one another?

rewona [7]

Answer:

Corvette Corvette

Explanation:

teehee

The answer is A btw :)

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3 years ago

Which term describes the image of an object that is placed in front o a convex mirror?

Dmitriy789 [7]

Answer:

The answer of this question is :- Virtual image

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3 years ago

Read 2 more answers

The long tube that moves food from the mouth to the stomach is called the __________.

AnnyKZ [126]

A the esophaguses!!!!!

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3 years ago

according to Newton's 1st law, in what direction Will an object continue to move if no other outside force acts upon it

asambeis [7]

Answer: <em>An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force.</em>

Explanation: meaning, an object will continue in its same direction until stopped or acted upon by another force.

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4 years ago