Answer:

Explanation:
The minimum distance for takeoff is:




Yeah I conclude that the answer is A because it need distance but with out charge it would no get that distance so yeah A
Are there any answer choices?
Submarines use <span>buoyancy by filling ballast tanks up with water. When they are filled with water, they are more dense than the surrounding water, so they are able to sink. If they want to rise, they fill these tanks up with air so that the density is less than the water it surrounds.
Hope this helps! :)</span>
Answer:
The water level rises at 11.76 
let be h: height and s: side of an equilateral triangle
Explanation:
The picture shows a diagram of the situation, first we have to determine the height of the trough as follows:
With the Pytagorean Theorem we can find out that:

Then, the area of an equilateral triangle, as any triangle, is a half of its base times its height:

Replacing values, we have:

That is the total area of the trough, but the problem specifies that it has been filled until 0.5 ft. Therefore, we have to find the cross section area of the water flow by substracting the total area minus the unfilled area of the trough:

Then, the cross section area of water flow is

Finally, to determine the speed of water flow at this point we solve for v, the flow formula:

SI or the Systeme' Internationale' is a body in science that fixes the unit of measurements used for different basic dimensions. The SI unit for distance is meter while that of time is second. Since velocity is equal to distance over time, the SI unit for velocity is m/s.