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PSYCHO15rus [73]
3 years ago
10

State two devices that transfer heat out of a cool environment into a warm environment​

Physics
1 answer:
Molodets [167]3 years ago
4 0

Answer:

Heat pump

Refrigerators

Explanation:

Some devices like heat pump and refrigerators used transfers of thermal energy in a cool region to warm other region.

These types of devices used for transferring heat energy by thermal conduction method.

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agasfer [191]

Answer:19.997m/s

Explanation:

Velocity=√(centripetal acceleration×radius)

Velocity=√(13.33×30)

Velocity=√(399.9)

Velocity=19.997

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3 years ago
I need number two only
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Answer:

d: ice is less dense than liquid water.

Explanation:

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Cell phones require powerful batteries in order to work effectively. Which
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D. Improving their design to make it easier to recycle them when they are no longer useful.

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3 years ago
A resistor R1 is wired to a battery, then resistor R2 is added in series.
Reika [66]

Answer:

a) The voltage on resistor R1 is less than before. Letter B.

b) The current through R1 is less than before. Letter B.

c) The resistance of the circuit went up by adding R2 in series. Letter A.

Explanation:

a) The new resistor R2 was added in series, that means the same current goes through both resistors (R1 and R2) and that the sum of the individual voltage drop of those resistors should be the same as the voltage of the source. Before there was only resistor R1 connected to the source, so all the voltage of the source was being delivered to that component, but now it is divided between R1 and R2. So the voltage on R1 is less than previously. Letter B.

b) A battery works as a voltage source, so assuming it's charged, it delivers a value of voltage to the circuit, while the current flow through it is defined by the equivalent resistance across the terminals. Since the new resistor was added in series the total resistance of the circuit went up and the current delivered by the battery went down. Letter B.

c) Since the equivalent resistance for a series connection is the sum of the resistors, R12 = R1 + R2, the resistence went up. Letter A.

5 0
3 years ago
The amount of kinetic energy an object has depends on which feature of the object?
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Explanation: Potential energy is stored energy when an object is without motion, kinetic energy is the energy when a object is in motion.

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3 years ago
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