The correct answer of this question: 18789.79 watt.
EXPLANATION:
As per the question, the surface area of the log is given as A =
The temperature of the of the surface of the log t = 800
We know that
⇒ 800 degree celsius= 800+273 K
= 1073 K.
Here, K stands for kelvin scale.
We are asked to calculate the thermal power radiation .
The power is defined as the amount of energy released per unit time.
Hence, power is calculated as-
Power P =
=
= 18789.79 watt. [ans]
Here, is the Stefan-Boltzmann constant and T is the absolute temperature of the log.
The major negative consequence that the global dependence on fossil fuels would likely result is the worldwide phenomenon called the global warming. The burning of fossil fuels releases carbon dioxide into the atmosphere wherein excess build-up of these causes to trap more sunlight on the earth's surface causing it to warm.
Answer:
The lower mantle is the liquid inner layer of the earth from 400 to 1,800 miles below the surface.
Explanation:
Answer:
Explanation:
Energy and mass are related by the famous equation developed by Albert Einstein:
where m = mass and c = speed of light
This equation explains that an object with very small mass can produce a large amount of energy in reactions such as a nuclear reaction.
Hence, the energy produced by the explosion of a Plutonium bomb containing 3.6 grams of matter is:
E =
Actually, No. That operation doesn't give you the speed, and that statement is false.
One clue is the units. If you multiply time by distance, you'd get an answer with units of hour-miles or second-meters. These are absurd units, with no physical significance.
Speed = (distance covered) <u>DIVIDED BY</u> (time to cover the distance)
When you divide distance by time, you get an answer with units like "miles per hour" or "meters per second". Without going into a long-winded discussion, I can't PROVE to you that this is actually the correct speed, but these units sure do smell a lot better.