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RoseWind [281]
3 years ago
10

A person is in a room whose walls are maintained at a temperature of 17 °C. The temperature of the person’s skin is 32 °C. The s

urface area of the person’s skin is 1.4 m2. Determine the netheat transfer rate leaving the person.
Physics
1 answer:
lbvjy [14]3 years ago
4 0

Answer:

sned me short notes of Physics of all branches (post graduation level) thanks  

+923466867221

Explanation:

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Certain gases in the atmosphere trap heat on Earth.
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The answer is <span>A.)the greenhouse effect 
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Two 1-kg objects, C and D, increase in temperature by the same amount, but the
Ede4ka [16]

The object D is made up of material Lead. The correct option is D.

<h3>What is specific heat?</h3>

The specific heat is the amount of heat required to change the temperature by 1°C. It is denoted by C.

Two 1-kg objects, C and D, increase in temperature by the same amount, but the thermal energy transfer of object C is greater than the thermal energy transfer of object D. The object C has a specific heat of 235 J/kg-K.

Q = m C ΔT

Qc > Qd

The energy transfer is proportional to specific heat.

Specific heat of D must be less. The possible material with specific heat less than the given value is for Lead material.

Thus, the correct option is D.

Learn more about specific heat,

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4 0
1 year ago
Two people stand across from one another at the top edges of identical buildings, 50 meters above the ground. One person throws
cricket20 [7]

Answer:

C

Explanation:

Hope this helps!!!!

6 0
2 years ago
17 copper wires of length l and diameter d are connected in parallel to form a single composite conductor of resistance R. What
Lubov Fominskaja [6]

Answer:

\frac{D}{d} = 4.12

Explanation:

As we know that resistance of one copper wire is given as

r = \rho \frac{L}{a}

here we know that

a = \pi (\frac{d}{2})^2

now we have

r = \rho \frac{L}{\pi (\frac{d^2}{4})}

r = \rho \frac{4L}{\pi d^2}

now we know that such 17 resistors are connected in parallel so we have

R = \frac{r}{17}

R = \rho \frac{4L}{17 \pi d^2}

Now if a single copper wire has same resistance then its diameter is D and it is given as

R = \rho \frac{4L}{\pi D^2}

now from above two equations we have

\rho \frac{4L}{\pi D^2} = \rho \frac{4L}{17 \pi d^2}

D^2 = 17 d^2

now we have

\frac{D}{d} = 4.12

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2 years ago
Does one of the planets spin backwards on its axis compared to the rest of the planets
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Yes they do because they just have to
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2 years ago
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