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.
Answer:
Mass = Size, Weight = Heaviness
Explanation:
Mass is how much matter that is in an object
Weight is a measurement that indicates how heavy something
Answer:
Option B. inertia
Explanation:
Inertia can be explained as the property of a body due to which the body resists any change in its form or shape.
The given case complies with Newton's first law or Law of inertia which says_ a body in motion will remain in that state of motion or at rest will continue to be in that stationary until it comes under the action of some external force.
Therefore, a meteor moving through outer space will continue on that path until acted upon by an external force.
Answer:
After 9 seconds the object reaches ground.
Step-by-step explanation:
We equation of motion given as h = -16t²+128t+144,
We need to find in how many seconds will the object hit the ground,
That is we need to find time when h = 0
0 = -16t²+128t+144
16t²-128t-144= 0
Negative time is not possible, hence after 9 seconds the object reaches ground.