If you rub a balloon on a piece of fabric or carpeting and then hold it against your head, your hair can stand on end. Use what
2 answers:
You might be interested in
Answer:
7142.86W
Explanation:
Given parameters:
Work done by brake = 40000J
Time taken = 5.6s
Unknown:
Power used by car = ?
Solution:
Power can be defined as the rate at which work is done. It is mathematically expressed as;
Power =
Now input the variables;
Power = = 7142.86W
Answer:
The thermal power emitted by the body is
The net power radiated is
Explanation:
From the question we are told that
The length of the assumed human body is L = 2.0 m
The circumference of the assumed human body is
The Stefan-Boltzmann constant is
The temperature of skin
The temperature of the room is
The emissivity is e=0.6
The thermal power radiated by the body is mathematically represented as
substituting value
The net power radiated by the body is mathematically evaluated as
Where A is the surface area of the body which is mathematically evaluated as
substituting values
=>
=>