Answer:
the water level was shallow beach, then it rose to deep sea, then the water receded to a beach
Earth rotates or spins on its axis once each day and revolves around the Sun once every year
Both men did equal work and the second person worked faster
Answer:
<u> Power = 9.75 ×10^8</u>
Explanation:
- Power is rate of change of energy.
- Here gravitational energy is transferred to kinetic energy of water at a definite rate.
For one second 650m^3 of water flows out down to 150m oh depth.
So, the energy at a height of 150m is transformed to kinetic energy.
for a second,
650m^3 of water flows down ⇒ (1000kg/m^3 × 650m^3) = 6.5×10^5kg of warer flos down.
The total gravitational potential energy stored in water is
= <u>mass of water × height× gravity</u>
= 6.5 ×10^5 × 150 × 10 = 9.75 ×10^8
As it is transformed in a second it is also equal to <u>Power.</u>
Answer:
Explanation:
As we know that the dimensions of the base of the tank is given as
now the base area is given as
now we know that volume of the liquid filled in the tank is given as
now we will differentiate it with respect to time both sides
here we know that
now we have