Answer: Find an answer to your question given A=125.0=0.4 and 25.0=0.1 calculate A-B
Explanation:
According to the inverse square law of light, <span>apparent brightness will decrease by a factor of 9. Use the formula </span>
![B=L/(4*pD^2)](https://tex.z-dn.net/?f=B%3DL%2F%284%2ApD%5E2%29)
, to check it.
The speed of the car at the top of the hill is 14m/s
<u>Explanation:</u>
given that
Initial velocity u of the car=0 m/s
The distance can be determined by finding out the difference between the elevation of the first slope and second slope.
elevation of the first slope=26 m
elevation of second slope=16m
distance s=26-16=10 m
acceleration due to gravity g=9.8 m/s2
speed of the car at the top of the hill can be determined by using the equation
![v^2=u^2+2as\\v^2=0^2+2\times 9.8\times 10\\=196\\v=\sqrt{196} =14m/s](https://tex.z-dn.net/?f=v%5E2%3Du%5E2%2B2as%5C%5Cv%5E2%3D0%5E2%2B2%5Ctimes%209.8%5Ctimes%2010%5C%5C%3D196%5C%5Cv%3D%5Csqrt%7B196%7D%20%3D14m%2Fs)
speed of the car at the top of the hill is 14m/s
According to your formula, because Th>Tc, the density of hot air greater than the density of cold air.<span>Hint: You can rearrange the ideal gas law to get </span>
<span>Reference https://www.physicsforums.com/threads/density-of-hot-air.528991/</span>