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3 years ago

A is a hot object. B is a cold object. the two are brought into contact with each other so that heat is developed

Physics

1 answer:

Umnica [9.8K]3 years ago

3 0

Answer:

A) Cold object will start getting hot

B) Heat exchange will stop as the two object acquire the same temperature.

Explanation:

A) When one hot object and one cold object are kept in contact then the heat is transferred from the hot object to the cold object via different modes of heat transmission. Hence, the cold object starts getting hot

B) The transmission of heat from the hot object to the cold object will stop as the temperature of the two object becomes equal to each other.

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3 years ago

A stone sphere of radius 7.00 m rests in a flat field. Relative to the ground, what is the gravitational potential energy of a 9

Molodets [167]

Answer:

(B) 1.23 x 10⁴ J

Explanation:

Given;

radius of the sphere, r = 7.0 m

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2 years ago

Why are temperature variations greater over land than they are over water?

Stells [14]

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3 years ago

How much energy is needed to change the temperature of 50.0 g of water by 15.0oc?

UkoKoshka [18]

The amount of energy needed to increase the temperature of a substance by $\Delta T$ is given by:
$Q=m C_s \Delta T$
where
m is the mass of the substance
Cs is the specific heat capacity of the substance
$\Delta T$ is the increase in temperature

In our problem, m=50.0 g, $C_s = 4.18 J/g ^{\circ}C$ (specific heat capacity of water) and $\Delta T=15.0 ^{\circ}C$ , therefore the amount of energy needed is
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3 years ago