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Alex787 [66]
3 years ago
7

Physical activity and exercise typically lead to

Physics
2 answers:
Dmitry [639]3 years ago
8 0

Answer:

The answer is C (Higher energy levels)

Explanation:

Because it's C

Alex3 years ago
6 0

Answer:

C

Explanation:

I got a 100

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The graph represents the reaction 2H2 + 02 32H20 as it reaches
Alex

Answer:

C and D

Explanation:

5 0
2 years ago
Read 2 more answers
A device used to measure the atmospheric pressure is the barometer. true false
Angelina_Jolie [31]
True, I just learned this a week ago. Is this for Chemistry?
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2 years ago
Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held const
kozerog [31]

Answer:

The right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

Explanation:

Thickness of the wall is  L=  20cm = 0.2m

Thermal conductivity of the wall is  K = 2.79 W/m·K

Temperature at the left side surface is T₁ =  50°C

Temperature of the air is T = 22°C

Convection heat transfer coefficient is  h = 15 W/m2·K

Heat conduction process through wall is equal to the heat convection process so

Q_{conduction} = Q_{convection}

Expression for the heat conduction process is

Q_{conduction} = \frac{K(T_1 - T)}{L}

Expression for the heat convection process is

Q_{convection} = h(T_2 - T)

Substitute the expressions of conduction and convection in equation above

Q_{conduction} = Q_{convection}

\frac{K(T_1 - T_2)}{L} = h(T_2 - T)

Substitute the values in above equation

\frac{2.79(50- T_2)}{0.2} = 15(T_2 - 22)\\\\T_2 = 35.5^\circC

Now heat flux through the wall can be calculated as

q_{flux} = Q_{conduction} \\\\q_{flux}  = \frac{K(T_1 - T_2)}{L}\\\\q_{flux}  = \frac{2.79(50 - 35.5)}{0.2}\\\\q_{flux} = 202.3W/m^2

Thus, the right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

6 0
2 years ago
43
Inga [223]

Answer is c, they are equal:

Explanation:

4 0
3 years ago
Matter that emits no light at any wavelength is called
lorasvet [3.4K]

Matter that emits no light at any wavelength is called DARK MATTER.

4 0
2 years ago
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