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Georgia [21]
3 years ago
13

Popping popcorn is a thermodynamic process. Assume the pot remains covered while popcorn is being popped and the contents of the

pot are the system. Which of the following correctly describes some feature of the system or what happens to the system undergoing this thermodynamic process?A. W > 0.B. Q>0.C. Tincreases.D. AU < 0.E. Pincreases.F. V-constant.
Physics
1 answer:
pentagon [3]3 years ago
8 0

Answer:

the answer is C

Explanation:

Mark me brainlest

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<span>When an individual looks through a filtered telescope in which he or she observes the sun, the portion where it appears blotchy is likely to be called the sunspots while the layer of the sun where it shows where it occurs is called the photosphere.</span>
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4 years ago
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Bill and Nageen have each built an electric motor and they are testing them by having them lift boxes. Bill's motor lifts a box
mariarad [96]

Answer:

Bill's motor

Explanation:

Bill's motor lifts a box 0.39 metres in 2 seconds.

Nageen's motor lifts the same box 0.35 metres in 2 seconds.

Power = Work done/time

or

P=\dfrac{mg\times h}{t}

Power of bill's motor,

P_1=\dfrac{m\times 9.8\times 0.39}{2}\\\\P_1=1.91m\ Watts

Power of Nageen's motor,

P_2=\dfrac{m\times 9.8\times 0.35}{2}\\\\P_2=1.71m\ Watts

So, Bill's motor applied more power to the box.

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3 years ago
The human body has an average density of 979 kg/m3 , what fraction of a person is submerged when floating gently in fresh water?
FromTheMoon [43]

A person is submerged of about 97.9%.

The average density of the human body is given as 979 kg/ m³.

<h3>Define Law of floatation.</h3>

    Law of floatation can be defined as the volume of the liquid displaced when a body floats on the liquid surface is equal to the body submerged in the water.

As body has the stable equilibrium state, the buoyancy of the fluid will be equal to the weight.

Weight of the body floating = Weight of the body immersed in fluid

  Law of floatation = Density of the floating object / density of fluid

 As fluid is the freshwater here, the density of fluid will be 1000 kg/ m³.

                               = (979 kg/ m³) / ( 1000 kg/ m³)

                               = 97.9 %

A person is submerged when floating gently in fresh water about 97.9%.

Learn more about law of floatation,

brainly.com/question/17032479

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4 0
1 year ago
A runner hopes to complete the 10,000m run in less than 30,0min, after running at constant speed for exactly 27.0 min , there ar
tankabanditka [31]
Well I figured out at his current pace, he would finish the 1100 remaining meters in 200 seconds. However, he needs to complete it in 180 seconds. I'm not sure how to find out how long he has to accelerate at 0.20 m/s/s to complete it in 180 seconds.

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3 years ago
A Molniya orbit is a highly eccentric orbit of a communication satellite so as to provide continuous communications coverage for
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Answer:

Answer: 18.3 km/s

Explanation:

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