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denis23 [38]
3 years ago
9

A temperature of 20°C is equivalent to approximately

Physics
2 answers:
igomit [66]3 years ago
8 0
Its the answer D. 68°F
algol133 years ago
7 0

A temperature of 20°C is equivalent to approximately

A. 32°F.

B. –6°F.

C. 136°F.

D. 68°F.

The correct answer for this question is D. 68°F

~ Please mark Brainiest :)

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When a burning stick of increase is moved fast in a circle a circle of red light is seen.​
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The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

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A 0.4000 kg sample of methanol at 16.0ºC is mixed with 0.4000 kg of water at 85.0ºC. Assuming no heat loss to the surroundings,
AVprozaik [17]

Answer:

T_finalmix = 59.5 [°C].

Explanation:

In order to solve this problem, a thermal balance must be performed, where the heat is transferred from water to methanol, at the end the temperature of the water and methanol must be equal once the thermal balance is achieved.

Q_{water}=Q_{methanol}

where:

Q_{water}=m_{water}*Cp_{water}*(T_{waterinitial}-T_{final})

mwater = mass of the water = 0.4 [kg]

Cp_water = specific heat of the water = 4180 [J/kg*°C]

T_waterinitial = initial temperature of the water = 85 [°C]

T_finalmix = final temperature of the mix [°C]

Q_{methanol}=m_{methanol}*Cp_{methanol}*(T_{final}-T_{initialmethanol})

Now replacing:

0.4*4180*(85-T_{final})=0.4*2450*(T_{final}-16)\\142120-1672*T_{final}=980*T_{final}-15680\\157800=2652*T_{final}\\T_{final}=59.5[C]

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3 years ago
What happens to thermal energy when Kinetic energy is Increased/Decreased?
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Answer:If kinetic energy increases, so does the thermal energy, and vice versa.

Please brainliest!

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