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katrin [286]
3 years ago
9

a scientist heats a piece of iron until it is glowing white–hot. he places the metal inside a metal box. he removes all of the a

ir from the inside of the box. after a few seconds, the sides of the box that are not touching the metal begin to feel warm. which process is most likely responsible for the warming? convection convection current radiation evaporation
Physics
2 answers:
Delvig [45]3 years ago
8 0

Answer:

Radiation.

Explanation:

convection: The movement of heat through liquids.

convection current: The motion of moving the convection's mass.

radiation: The transfer of heat in wave like movements through electromagnetic waves.

evaporation: When a substance reaches its boiling point and turns to a gas.

So, since the heated iron is not touching any sides of the metal box, but the sides are still getting hot, the iron is radiating throughout the box.

torisob [31]3 years ago
4 0
Heat transfer through Radiation is responsible.

This is heat transfer that does not require a material medium or contact is not required.
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const2013 [10]

Answer:

3.06m/s² to the east

Explanation:

Given parameters:

Mass of car = 2.5 x 10³kg

Force acting on the car  = 7.65 x 10³N

Unknown:

Acceleration of the car  = ?

Solution:

From Newton's second law of motion:

      Force  = mass x acceleration

   Acceleration  = \frac{Force }{mass}   = \frac{7.65 x 10^{3} }{2.5 x 10^{3} }    = 3.06m/s² to the east

6 0
3 years ago
A ball is being rolled by a normal push of 180N. It is opposed by friction which has a force of 61N and air resistance which has
Nina [5.8K]

Resultant force is basically the force left after everything is added.

if a ball is being pushed one one side with 180N, and being pushed on teh opposite side with 84N (I added friction and air resistance since they're acting on the same side), then the resultant force would be:

180N - 84N =<u> 96N</u>   (you can determine whether it's positive or negative based on the direction of the vector)

7 0
3 years ago
What are two ways to increase impulse?
Pepsi [2]

Answer:

increase the time the force acts or you could increase the number of temptations.

hope this helped!

5 0
3 years ago
Jackson ran in a marathon for 3 hours. The marathon was 185 miles long. How fast was the runner running?
boyakko [2]

Answer:

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Explanation:

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4 0
3 years ago
A refrigerator is used to cool water from 23°C to 5°C in a continuous manner. The heat rejected in the condenser is 570 kJ/min a
GenaCL600 [577]

Answer: Q=5.46 L/s

COP=2.58

Explanation:

Given that

Cp = 4.18 kJ/(kg.C

density  = 1 kg/L

Heat rejected Qr= 570 kJ/min

Power in put W= 2.65 KW

From first law of thermodynamics

U = W+ q

q = Heat absorbed

U = internal energy

W = workdone

U = 570 kJ/min  = 9.5 KW

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q = 6.85 KW

COP = q/W

COP = 6.58 / 2.65

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Lets take volume flow rate is Q

So mass flow rate of water m = ρ Q

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Q=0.091 L/min

Q=5.46 L/s

7 0
3 years ago
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