Answer: The first answer for the first problem, and the 2nd answer for the second problem
Explanation: For the first one, if it is absolute zero, the molecules would not move at all.
For the second one, the temperature of the sample will increase due to the movement.
Answer:
Yes
Explanation:
The four outer planets are all gas giants made primarily of hydrogen and helium. They have thick gaseous outer layers and liquid interiors.
Answer:
The factor of the diameter is 0.95.
Explanation:
Given that,
Power of old light bulb = 54.3 W
Power = 60 W
We know that,
The resistance is inversely proportional to the diameter.
![R\propto\dfrac{1}{D}](https://tex.z-dn.net/?f=R%5Cpropto%5Cdfrac%7B1%7D%7BD%7D)
The power is inversely proportional to the resistance.
![P\propto\dfrac{1}{R}](https://tex.z-dn.net/?f=P%5Cpropto%5Cdfrac%7B1%7D%7BR%7D)
![P\propto D^2](https://tex.z-dn.net/?f=P%5Cpropto%20D%5E2)
We need to calculate the factor of the diameter of the filament reduced
Using relation of power and diameter
![\dfrac{P_{i}}{P_{f}}=\dfrac{D_{i}^2}{D_{f}^2}](https://tex.z-dn.net/?f=%5Cdfrac%7BP_%7Bi%7D%7D%7BP_%7Bf%7D%7D%3D%5Cdfrac%7BD_%7Bi%7D%5E2%7D%7BD_%7Bf%7D%5E2%7D)
Put the value into the formula
![\dfrac{D_{i}^2}{D_{f}^2}=\dfrac{54.3}{60}](https://tex.z-dn.net/?f=%5Cdfrac%7BD_%7Bi%7D%5E2%7D%7BD_%7Bf%7D%5E2%7D%3D%5Cdfrac%7B54.3%7D%7B60%7D)
![\dfrac{D_{i}}{D_{f}}=0.95](https://tex.z-dn.net/?f=%5Cdfrac%7BD_%7Bi%7D%7D%7BD_%7Bf%7D%7D%3D0.95)
![D_{i}=0.95 D_{f}](https://tex.z-dn.net/?f=D_%7Bi%7D%3D0.95%20D_%7Bf%7D)
Hence, The factor of the diameter is 0.95.
Answer: The average velocity is 150 km/h
Explanation: 70+80=150
Answer:
Explanation:
The answer is C. Both options are correct