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3 years ago

Why is the sky blue

2 answers:

7 0

The sky is blue because blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels in shorter and smaller waves. This is why we see a blue sky most of the time. Hope this helps!

liubo4ka [24]3 years ago

3 0

Answer:

The light reflecting off of the water goes into the atmosphere, which is why the sky appears blue.

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A sand storage tank used by the highway department for winter storms is leaking. As the sand leaks out, it forms a conical pile.

harina [27]

Answer:

Rate of change of volume of the pile $= 54\pi$

Explanation:

Given -

Rate of increase of the base of the pile $= 0.75$ inches per minute

Height of the pile $= 2 *$ the radius of the base

Let "h" be the height of the pile and "r" be the radius of the base.

Then $h = 2* r$

Radius "r" $= 6$ inches

Rate of change of radius i.e

$\frac{dr}{dt} = 0.75$

Volume of conical pile

$\frac{\pi }{3} * r^2 * h\\= \frac{\pi }{3} * r^2 * 2 * r\\= \frac{\pi }{3} *2* r^3$

Change in volume of conical pile

$\frac{dV}{dt} = \frac{dr}{dt} * \frac{6* \pi * r^2 }{3}$

Substituting the value of rate of change of radius, we get -

$\frac{dV}{dt} = 2 * \pi * (6^2) * (0.75)\\\frac{dV}{dt} = 54 \pi$

Rate of change of volume of the pile $= 54\pi$

8 0

3 years ago

The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual processes or ____

dusya [7]

The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or Catastrophic events.

6 0

3 years ago

Read 2 more answers

What is active transport?

alexandr402 [8]

Active transport is a cellular transport mechanism. It’s the movement of molecules that are assisted by enzymes along the way to a higher concentration.

3 0

3 years ago

Fish rely on coral for

vampirchik [111]

They use them as food and habitats.

7 0

4 years ago

Read 2 more answers

What happens to all the weight of the food we eat

Margarita [4]

Answer:

All the weight of food we eat can happen in many ways. It can be digested and turned into waste. It can also be turned into body fat. The weight of the food we eat can help give us nutrition and vitamin s.

Explanation:

The weight of food can slightly go away due to food going in to the digestion system and turns into waste.

Apologies if this isn't the best answer.

5 0

3 years ago