Q011) The Doppler effect a. occurs when the frequency of sound waves received is lower if the wave source is moving toward you t
1 answer:
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Answer:
The pressure of the air is 499.91 kPa.
Explanation:
Given that,
Initial pressure = 430 kPa
Temperature = 13.0+273=286 K
Final temperature = 59.5+273=332.5 K
We need to calculate the final pressure
Using relation of pressure and temperature
At constant volume,
Hence,The pressure of the air is 499.91 kPa.
Answer:
2940.1 joules would you burn in climbing stairs all day.
Explanation:
Work = W = F d
going up stairs would be against force of gravity
W = mgh
where h is the height
the question is not complete because we need speed or distance
h = v t
so assuming 1 step per second
h = 86,400 steps 7inchs/step
0.0254 m/inch
h = 15362 m
so from this
W = 800 N 15362
= 12289600 J
that means YOU need 12289600 J to walk 1 step per second all day
divide that by 4180 J /Kcal
Kcal =
=
= 2940.1 Kcal
if you ran faster you would use more energy 2 steps per second would mean 5880 Kcal.