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Furkat [3]
3 years ago
11

What is the idea that all continents were part of one big landmass?

Biology
2 answers:
omeli [17]3 years ago
6 0
B is the answer continental drift
Aloiza [94]3 years ago
5 0

Answer:

The answer is B: continental drift

Explanation:

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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
A protective layer that shields the surface from lethal ultraviolet light is found in which layer of the atmosphere?
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A protective layer that shields the surface from lethal ultraviolet light is found in the layer of the atmosphere known as the Stratosphere. 

Therefore, the correct answer is option C for this specific statement.<span />
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Different ways pulse rate can be used to measure fittness
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How is an insulin gene removed from a strand of human DNA?
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The human gene for insulin production is identified and removed using enzymes called restriction enzymes. The same restriction enzymes are used to cut open a plasmid (a small, circular section of DNA).
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