Answer:
B) Power is the rate at which work is done
Pumice is a lightweight rock that sometimes forms when lava is very rich in volcanic glass.
<u>Explanation:</u>
Pumice is a lightweight rock formed after cooling of lava erupted from the volcano. These rocks are composed of minerals which are present in deep underground of volcano which after eruption in high temperature and pressure comes out as lava.
As time goes the lava will get cooled down and form rocks which can be classified as igneous rocks. One of the rocks formed from lava are termed as Pumice.
This process of physically separating a single phase mixture into several components would be termed simple distillation, I believe.
As it is mentioned that one is separating them based on their different boiling points.
Answer:
The thermal efficiency is 43%.
The total amount of energy developed by work is 397 kW in one year.
Explanation:
Given that,
Power output = 0.3 kW
Heat energy = 2400 Btu/h = 0.703 kW
We need to calculate the thermal efficiency
Using formula of efficiency
Put the value into the formula
The thermal efficiency is 43%.
(b). We need to calculate the total amount of energy
Using formula of energy
Hence, The thermal efficiency is 43%.
The total amount of energy developed by work is 397 kW in one year.
Calculate the pressure due to sea water as density*depth.
That is,
pressure = (1025 kg/m^3)*((9400 m)*(9.8 m/s^2) = 94423000 Pa = 94423 kPa
Atmospheric pressure is 101.3 kPa
Total pressure is 94423 + 101.3 = 94524 kPa (approx)
The area of the window is π(0.44 m)^2 = 0.6082 m^2
The force on the window is
(94524 kPa)*(0.6082 m^2) = 57489.7 kN = 57.5 MN approx
