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garik1379 [7]
4 years ago
6

Heat pumps and refrigerators are modern conveniences that came from the study of thermodynamics. In a paragraph explain how they

work
Physics
1 answer:
balandron [24]4 years ago
4 0

Answer and Explanation

An electric devise which extracts heat from a point and transfers it to another is called a heat pump. Refrigerators and air conditioners apply this technology.

A heat pump circulates the refrigerant through an evaporation  and condensation cycle to transfer the heat. A compressor then pumps the refrigerant substance between two heat exchanger coils. In one of the coil, the refrigerant undergoes evaporation at low pressure to absorb heat from the surrounding. The refrigerant then undergoes compression to follow the other coil where it undergoes condensation at high pressure. It releases the heat at this point that has been absorbed in the cycle.



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AleksandrR [38]

Answer:

e = 10 V

Explanation:

given,

number of the coaxial loops = 10

Cross sectional area =  0.5 m²

magnitude of magnetic field =

B = 3 T + (2 T/s)*t.

B = ( 3+ 2 t ) T

induced potential difference = ?

At time = 2 s

we know,

induced emf

e = - N\dfrac{d\phi}{dt}

∅ = B . A

e = - N\dfrac{d(BA)}{dt}

e = - NA\dfrac{dB}{dt}

e = - 10 \times 0.5 \times \dfrac{d}{dt}(3 + 2 t)

e = - 10 \times 0.5 \times 2

e = -10 V

magnitude of induced emf

|e| = |-10 V|

e = 10 V

the induced potential difference in the loop = e = 10 V

7 0
3 years ago
Which of the following is the best reason for using a scanning electron microscope?
torisob [31]

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Explanation:

To enable the technician see fractures and broken particles in a better resolution as the SEM sees the peaks and valley of the structure.

8 0
3 years ago
What is the relationship between wavelength of light and the quantity of energy per photon?
slamgirl [31]

Answer:

The quantity of energy per photon is inversely proportional to the wavelength of the light.

Explanation:

Energy of light is given as

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f = frequency of the light

If the number of photons = n

(E/n) = (h/n) f

Let (E/n) = E'

(h/n) = h'

But the frequency of light is related to wavelength through the relation

v = fλ

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λ = wavelength of light

f = (c/λ)

E' = h' f

Substituting for f

E' = h' (c/λ)

h' and c are both constants, h'×c = K

E' = (K/λ)

So, the quantity of energy per photon is inversely proportional to the wavelength of the light.

Hope this Helps!!!

3 0
4 years ago
Read 2 more answers
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disa [49]

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Letter A: They travel in straight lines.
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