Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top. Explain how

Answers

Answer 1

Answer:

When hot water comes in contact with cold water , the hot water from the bottom of the vessel is hot and so reduces its density. So low density ware goes up and cold water from side or above replaces the space. This is how Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.

What is convection?

The process of heat transfer from one part of a fluid to another part by the actual movement of the particles of the fluid is called convection. Liquid and gases are heated by the process of convection.

learn more about convection

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Answer 2

Answer: The transfer of energy means, in convention process, transport of matter. In this case, hot water has lower density than cool water. The water with less density ascends and leaves gaps that are occupied with cooler water "packages".

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People in the United States know that water boils at 212°F. In Europe,people know that water boils at 100°C. Is the water in the U.S. different
than the water in Europe? What explains the two different temperatures?

Answers

They are not two different temperatures. They are two different
descriptions of the same temperature, using different-size degrees
and different scales. A lot like "60 miles per hour" and "96.6 kilometers
per hour" ... the same speed.

In the case of the temperatures, the tags " °F " and " °C " show that the
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How many types of quarks are there?
a. 2
b. 4
c. 6
d. 8

Answers

There are 6 types of quarks.

Answer: C. 6

The are 6 types of quarks: up, down, strange, charm, top, and bottom.
The answer:

C.6

a constant force of 391 n acts on a spacecraft of mass 7870 kg that has an initial velocity of 38 m/s. how far has the spacecraft traveled when it reaches a velocity of 4820 m/s?

Answers

Answer:

The distance travelled is 2.34*10^8 m.

Explanation:

The acceleration of the spacecraft is,

a=F/m

=391/7870 = 0.04968 m/s^2

The distance travelled,

d=v^2-v0^2/2a

=(4820)^2-(38)^2 / 2(0.04968)

=2.34*10^8 m.

Which of the following types of energy originates below Earth's surface?A. electrical energy
B. geothermal energy
C. mechanical energy
D. electromagnetic energy

Answers

Geothermal energy. Electromagnetic energy originates at the sun (think UV rays; they are part of the electromagnetic spectrum). Electrical energy technically can be anywhere, as long as there are positive and negative charges. Mechanical energy is like a generator or an engine; there is always something working to get things done/made. I hope this answer and these explanations helped!

A growing person needs a diet that supplies about 10MJ of energy per day. Calculate the amount of energy supplied by such a diet each second, and hence the person’s average power. (Give your answer to the nearest 10W)

Answers

We are given that a growing person needs a diet that supplies about 10 MJ of energy per day.

To convert this to energy supplied per second, we can use the following conversion:

1 day = 24 hours/day x 60 minutes/hour x 60 seconds/minute = 86400 seconds

Therefore, the energy supplied per second is:

10 MJ/day = 10,000,000 J/day ÷ 86400 seconds/day = 115.74 J/s

The person's average power is the energy supplied per second, which is:

P = 115.74 J/s ≈ 120 W (rounded to the nearest 10 W)

Therefore, the person's average power is approximately 120 W.

To know more about average power, click here:-

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Within a single use of the scientific method, which of the following steps can only be performed afterdata is collected?
A. Controls and variables are chosen.
B. The initial experiment is designed.
C. The initial hypothesis is formed.
D. Conclusions are drawn.

Answers

Within a single use of the scientific method, the step which would be performed after we collect data, would be the drawing of a conclusion out of the answers that you've presented - D.

It is usually the case that you first have to analyze the data after you've gather it and then you base your conclusions on it. This isn't, however, always the case.

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