Parachutists are hurt when jumping on the moon's surface,why?
2 answers:
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Answer:
Time elapsed
Explanation:
Acceleration is a vector quantity. It is defined as:
where
v is the final velocity
u is the initial velocity
t is the time elapsed
Acceleration is measured in meters per second squared (m/s^2). It must be noticed that acceleration is a vector, so it also has a direction. In particular:
- when acceleration is negative, it means that the object is slowing down, so acceleration is in opposite direction to the velocity
- when acceleration is positive, it means that the object is speeding up, so acceleration is in the same direction as the velocity
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
=>
=>
A 1000J or 1kJ of energy in 1 second implies that in 1 minute there will be 60kJ of energy converted.
Work is the defined as energy consumed thought time.
In our case,
Hope this helps!