I think the answer is c.<span>holding a tray in the cafeteria line</span>
Answer:

Explanation:
Recall weight density of water 62.5 lb/ft^3 and the height 6ft base 8ft
The width of the triangle

The hydrostatic force is the pressure times area of the submerged





![F=109.375[4x^2-\frac{1}{3}x^3]|4,8](https://tex.z-dn.net/?f=F%3D109.375%5B4x%5E2-%5Cfrac%7B1%7D%7B3%7Dx%5E3%5D%7C4%2C8)

the answer to this question is B
Answer:
a. 1000N/C
Explanation:
Data mentioned in the question
Electrical field magnitude = 1000 NC
Perpendicular distance = 0.1 m
Perpendicular distance = 0.2 m
Based on the above information, the electric field is
As we know that

where,
= surface charge density
E = distance from nearby point to sheet i.e be independent
The distance at 0.1 and 0.2, the electric field would remain the same
So,
Based on the above explanation, the first option is correct