Options
a. The worker carried the lunch up to the 53rd floor in the elevator.
b. The worker got a ride in a helicopter to the top of the 68-floor building and then carried the lunch down in the elevator to the 53rd floor?
c. The Worker carried it up the stairs to the 53rd floor.
d. Gravitational potential energy does not depend on the path taken.
Answer:
The gravitational Energy would remain the same in all cases.
Explanation:
Gravitational Energy is a conservative energy and its potential energy comes from gravitational actions.
An instance is when someone lifts a weight from the floor to a certain height and then dropped the weight back to the floor; the work done by the field will not be altered at all; it'll be the same throughout.
If otherwise, it'll be against thermodynamics 2nd law of physics because the object would have remaining energy after returning to the starting point,
For this reason, the gravitational potential energy only depends from the height, and is independent from the path taken to reach there.
The name of this landmas is known as <em>
</em>
Pangaea, was a supercontinent that existed during the late
Paleozoic and
early
Mesozoic eras. It formed approximately 300 million years ago and began to break apart after about 100 million years.
Theres an image of how this supercontinet looked
Answer:
a) 
b) 
Explanation:
Given;
- depth of the water-tank,

- length of the pipe,

- inclination of the pipe from the horizontal,

a)
Now the effective vertical height of the water column from the free surface of the water to the bottom of the pipe at house:



Now the pressure due to effective water head:

where:
density of the liquid, here water
acceleration due to gravity
height of the liquid column


b)
Now the height of water corresponding to this pressure will be the same as the effective water head by the law of conservation of energy.
