Answer:
The exit velocity air is 77.56 m/s.
Explanation:
Specific heat of air at 60°C is about 1.006 KJ/kg-K (from standard table).
Now from first law for open system
For ideal gas h=CT
Given that °C
°C
By putting the values
So the exit velocity air is 77.56 m/s.
Answer:
Explanation:
This figure given is the frequency; 2 times per second represents frequency.
What is frequency?
it is expressed as:
Frequency =
where n is the number of turns
t is the time taken
Therefore, the Barber spinned him 2 times in 1 second.
The period is the inverse of frequency. It is the time taken for a body to go through a point;
Period = =
s