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bonufazy [111]
3 years ago
5

Your bedroom gets direct sunlight through a window during the hottest part of the day. You ask your mom to turn down the thermom

stat in the house so your room can cool down. Instead, your mom suggests that you put aluminum foil over the windows. What will the results be if you take your mom's advice?
A. A room cooled by minimizing heat transfer by reflection.
B. A room cooled by minimizing heat transfer by radiation.
C. A room cooled by minimizing heat transfer by convection.
D. A room cooled by minimizing heat transfer by conduction.
Please help me! It would be greatly appreciated!!
Thank you so much!!
Physics
1 answer:
ycow [4]3 years ago
6 0
I want to say its cooled by reflection because of the foil, sun reflects off of the foil back into the atmosphere. I don't think it's conduction because I have the foil on my windows and it's never warm to the touch. it's not a liquid so I don't believe it's convection. The foil reflects the radiation so I don't think it's b, c or d. so I wanna say A but I'm not 100% sure
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brainly an andean condor with a wingspan and a mass soars along a horizontal path. model its wings as a rectangle with a width.
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The difference between the pressure at the top surfaces of the condor's wings and the pressure at the bottom surfaces is 101,204 Pa.

<h3>Difference in pressure between the top and bottom of the wingspan</h3>

The difference in pressure between the top and bottom of the wingspan is calculated as follows;

ΔP = P(top) - P(bottom)

<h3>Area of the wingspan</h3>

A = bh

A = 2.7 m x 0.27 m

A = 0.729 m²

<h3>Weight of the Andean condor</h3>

W = mg

W = 9 x 9.8

W = 88.2 N

<h3>Pressure at the top surface of condor's wings</h3>

The pressure at the top surface of condor's wings is due to atmospheric pressure

P(top) = 14.7 Psi = 101,325 Pa

<h3>Pressure at the bottom surface of condor's wings</h3>

The pressure at the bottom surface is due to weight of andean condor.

P = W/A

P(bottom) = 88.2/0.729

P(bottom) = 120.99 Pa

The difference between the pressure at the top surfaces of the condor's wings and the pressure at the bottom surfaces is calculated as;

ΔP = P(top) - P(bottom)

ΔP = 101,325 Pa - 120.99 Pa

ΔP = 101,204 Pa

The complete question is below;

An Andean condor with a wingspan of 270 cm and a mass of 9.00 kg soars along a horizontal path. Model its wings as a rectangle with a width of 27.0 cm.

Learn more about pressure here: brainly.com/question/25736513

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2 years ago
A car is traveling with a velocity of 5.5 m/s and has a mass of 1200 kg. What is the kinetic energy?!
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Answer:

<h2>18150 J</h2>

Explanation:

The kinetic energy of the car can be found by using the formula

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From the question we have

k =  \frac{1}{2}  \times 1200 \times  {5.5}^{2}  \\  = 600 \times 30.25

We have the final answer as

<h3>18150 J</h3>

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