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prisoha [69]
3 years ago
3

When would an object stop emitting radiation when it reaches -273 Calvin when it reaches zero Kelvin when it reaches zero Celsiu

s it would never stop emitting radiation
Physics
1 answer:
Andrej [43]3 years ago
7 0
<h2>Answer: when it reaches zero Kelvin</h2>

Explanation:

In this case, when we talk about radiation, we refer to thermal radiation, which is <u>electromagnetic radiation that is generated by the thermal movement of charged particles in a body or object. </u>

<u> </u>

In this context, every body with a temperature greater than absolute zero (0 Kelvin) emits thermal radiation.

However, lowering the temperature decreases the movement and kinetic energy in the body's molecules, causing a decrease in the emitted radiation. Therefore, if a body reaches 0 K it would stop emitting radiation.

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Three disks are spinning independently on the same axle without friction. Their respective rotational inertias and angular speed
ololo11 [35]

Answer:

3/7 ω

Explanation:

Initial momentum = final momentum

I(-ω) + (2I)(3ω) + (4I)(-ω/2) = (I + 2I + 4I) ωnet

-Iω + 6Iω - 2Iω = 7I ωnet

3Iω = 7I ωnet

ωnet = 3/7 ω

The final angular velocity will be 3/7 ω counterclockwise.

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4 years ago
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What is the volume of this bubble when it reaches the surface?
steposvetlana [31]

Answer:

Volume will be 15 mL. Solution:- If we look at the given information then it is Boyle's law as the temperature is constant and the volume changes inversely as the pressure changes. So, the volume of the air bubble at the surface will be 15 mL.

8 0
3 years ago
Kyle has a mass of 54 kg and is jogging at a velocity of 3 m/s.
Colt1911 [192]

Answer:

Kinetic energy can be solved by using the following formula: Kinetic energy = (1/2)*m*v^2

Explanation:

5 0
3 years ago
Using a 2.44kg sledge hammer, a railroad worker drives a 0.55kg spike into a railroad tie. The sledge hits the spike with a spee
Mazyrski [523]

Answer:

1547.6 J

Explanation:

From the law of conservation of energy, the sum of initial and final energy is the same. Energy can only be transformed into other forms but can't be created nor lost

Initial kinetic energy of the hammer system is given by

KE_i=0.5mv^{2} where m is mass of the body and v is the velocity

Substituting m for mass of hammer which is 2.44 Kg and v for 62 m/s

KE_i=0.5*2.44 Kg*(62 m/s)^{2}=4689.68 J

Since the hammer comes to rest, the final kinetic energy is zero since it's velocity is zero

KE_f=0 J

Change in kinetic energy is given by

\triangle KE= KE_f-KE_i hence 0-4689.68  J=-4689.68  J

Change in total internal energy is given by

\triangle PE-\triangle KE and in this case the change in potential energy is zero

\triangle PE-\triangle KE=0--4689.68 J=4689.68 J

Since only 0.33 of this energy is converted hence

0.33\times4689.68 J=1547.5944 J\approx 1547.6 J

6 0
3 years ago
Which proporty of potentiol energy distinguishes it from kenetic energy
Vikki [24]

Answer:

Shape and Position

Explanation:

Potential energy is defined as the stored energy in an object due of its position or its configuration; whereas the kinetic energy is defined as energy which a body can possesses because of its motion.

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3 years ago
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