The height isn’t a factor.
The gravitational force is the same no matter the height...
So W=mg
20 x 9.81 = 196.2 N
Work = (force) x (distance)
It doesn't matter if the whole football team is pushing on it.
Until the car moves, no work has been done.
Answer:
(a) the height in the open water column is: 18.15 (ft), (b) the gauge pressure acting on the bottom tank surface AB is: 8.73 (Psi) and (c) the absolute pressure of the air in the top of the tank with local atmospheric pressure at 14.7 Psi will be: 21.7 (Psi).
Explanation:
We need to apply the Pascal's Law, (
) where P is pressure, γ is the specific weight of the fluid and h is the height of the column of fluid, to find the pressure at differents points in the tank (see attached). First we need to assume a property of the water called specific weight as: 62.4 (lbf/ft^3) or 0.03612 (lbf/in^3). Then knowing that 1 feet as the same as 12 inches and appling Pascal's Law, we get:
and the other hand, we have:
and knowing that the pressure at point C and point D are the same, we can find the h as:
, so
getting h=217.75(in) or 18.15(ft) (a). Now similarly to find the gauge pressure acting on the bottom of the tank surface AB we can apply Pascal's Law as:
(b). Finally we can find the absolute pressure of the air in the top of the tank, assuming a local atmospheric pressure as 14.7 (Psi) so:
(c).
Hi there!
The two main factors influencing gravitational pull are...
1) Distance
2) Mass
According to the second law, heat which is also referred to as thermal energy can be completely converted into work.
The second statement is much related directly to the second law.
We can say that some energy is lost while other is used to do work.