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Kamila [148]
3 years ago
13

What is a device that does not work with an electric circuit?

Physics
1 answer:
storchak [24]3 years ago
8 0
It would be a bike that doesn't use an electric circuit.
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Atoms with certain characteristics are radioactive. Which is least likely to be radioactive? O A. all atoms with an atomic numbe
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The answer an be the option A.

Explanation:

Because radioactive substances have atomic number greater than 82.

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11. What's the best example of a source
earnstyle [38]

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D. A dry cell battery

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3 0
4 years ago
A Carnot air conditioner takes energy from the thermal energy of a room at 63°F and transfers it as heat to the outdoors, which
vodomira [7]

Answer:

For the Carnot air conditioner working as a heat pump between 63 and 100°F , It would transfer 3.125 Joules of heat for each Joule of electric energy supplied.

Explanation:

The process described corresponds to a Carnot Heat Pump. A heat pump is a devices that moves heat from a low temperature source to a relative high temperature destination. <em>To accomplish this it requires to supply external work</em>.

For any heat pump, the coefficient of performance is a relationship between the heat that is moving to the work that is required to spend doing it<em>.</em>

For a Carnot Heat pump, its coefficient of performance is defined as:

COP_{HP}=\frac{T_H}{T_H-T_L} Where:

  • T is the temperature of each heat deposit.
  • The subscript H refers to the high temperature sink(in this case the outdoors at 100°F)
  • The subscript L refers to the low temperature source (the room at 63°F)

Then, for this Carnot heat pump:

COP_{HP}=\frac{T_H}{T_H-T_L}=\frac{100°F}{100°F-63°F}=3.125

So for each 3.125 Joules of heat to moved is is required to supply 1 Joule of work.

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3 years ago
Which of the following is the center of the universe according to the geocentric model?
Dima020 [189]
Earth is the center according to the geocentric model.
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4 years ago
Read 2 more answers
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