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Montano1993 [528]
3 years ago
7

This question is part of a science report!

Biology
1 answer:
antiseptic1488 [7]3 years ago
5 0
Respiratory droplets produced when an infected person coughs, sneezes or talks.
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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
You are studying droplets of various solutions and comparing them to water. what shape do they start as?
cricket20 [7]

In the case of liquid droplets, including water, surface tension is the factor, which is accountable for their shapes and configuration. Though can easily be malformed, the droplets of water seem to be pulled into a spherical shape due to the cohesive forces of the surface layer.  

In the non-existence of other forces, involving gravity, the drops of almost all the liquids would be almost spherical.  


5 0
3 years ago
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During the year the beetles reached carrying capacity, a flood in the region decreased the population to about 77 beetles per he
tensa zangetsu [6.8K]

Answer:

After the flood the total number of beetles = number of beetles per hectare × 115 hectares = 8,855 beetles.

The carrying capacity is 14,600 beetles.

Explanation:

8 0
3 years ago
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Which of these is a part of good dental hygiene?
natka813 [3]
Yearly dental visits are a part of good dental hygiene because the dentist will check for cavities, fix them, clean your teeth very thoroughly (or whitening treatment), and check the progress and movement of your teeth. They can also recommend when dental surgery is necessary, for instance, if you have extra teeth that can be removed or when your wisdom teeth are coming in. Hope this helps! :)
8 0
3 years ago
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4. A diagram of the human digestive system is shown below. Removing which organ would have the smallest impact on digestion abso
miss Akunina [59]
The esophagus would be removed.
6 0
3 years ago
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