Answer:

Explanation:
From the question we are told that
Force of power 
Velocity of power 
Generally the equation for power is mathematically represented as


Generally the dot product of F and V is mathematically given as


Answer:
They can expect the size of the rocks to get smaller as the time passes.
Explanation:
They can expect the size of the rocks to get smaller as the time passes.
- This is so because the water falling from certain height under waterfall will exert mechanical impact on the rock due to the mass of the water. This will act as water hammer <em>causing wear and tear</em> to the rock particles and flowing them away with the stream of water.
- This hydraulic shock is generated when there is sudden stoppage in the motion of water. In sync with Newton's second law of motion, when the momentum of water is changed within a short course of time it creates a hammer like impact which has potential of wear and tear when an object is continuously subjected to it.
Answer:
1.89*10^8 J
Explanation:
The coefficient of performance of this device is
where Q .is the useful heat supplied or removed by the considered system and W is the work required by the considered system.
Step 1
Coeffiecient of perfromance for cooling (COPC) = 1.75 =
.
Q = 1.75W
Step 2
We convert day into seconds:
1 day = 24 hrs = 86400 seconds
Step 3
Heat that can be extracted from the house in a day is:
Q = 1.75 * 1.25 * 10^3 * 86400 = 189000000 = 1.89*10^8 J
Force = Mass * Acceleration
Answer:
0.035 (3.5 %)
Explanation:
The thermodynamic efficiency is given by:

where
is the cold temperature
is the hot temperature
In this problem we have

So the efficiency is
