Answer: (a) 0,142 (b) 52.99 (c) 2.83 (d) 88.26
Explanation:
If the refrigarating capacity is 150kw
(a) the mass flow rate of refrigerant, in kilograms per second is 0.142
(b) the power input to the compressor, in kilowatts is 52.99
(c) the coefficient of performance is 2.83
(d) the isentropic compressor efficiency is 68.6 per cent
Answer:
6.5 × 10¹⁵/ cm³
Explanation:
Thinking process:
The relation 
With the expression Ef - Ei = 0.36 × 1.6 × 10⁻¹⁹
and ni = 1.5 × 10¹⁰
Temperature, T = 300 K
K = 1.38 × 10⁻²³
This generates N₀ = 1.654 × 10¹⁶ per cube
Now, there are 10¹⁶ per cubic centimeter
Hence, 
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Answer:
The hydrostatic force of 313920 N is acted on each wall of the swimming pool and this force is acted at 1 m from the ground. The hydrostatic force is quadruple if the height of the walls is doubled.
<u>Explanation:</u>
To calculate force on the walls of swimming pool whose dimensions are given as <em>8-m-long, 8-m-wide, and 2-m-high</em>. We know that formula for hydrostatic force is 
, we know ρ=density of fluid=1000 
,
g=acceleration due to gravity=9.81 
, h=height of the pool=2 m and l=length of the pool=8 m.
hydrostatic force on each wall=
= 313920 N.
<em>The distance at which hydrostatic force is acted is half of the height of the swimming pool.
</em>
At 1 m from the ground this hydrostatic force is acted on each wall.
The force is <em>quadruple if the height of the walls of the pool is doubled</em> this is because, the<em> height is doubled and taken as h=4 m</em> and substitute in the equation =
= 
= 1255680 N. This is 4 times 313920 N.
