Suppose water is leaking from a tank through a circular hole of area A, at its bottom. When water leaks through a hole, friction and contraction of the stream near the hole reduce the volume water leaving the tank per second to cA, V2gh, where c (0

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Chapter6: Topics In Analytic Geometry
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Suppose water is leaking from a tank through a circular hole of area A, at its bottom. When water leaks through a hole, friction and contraction of the stream near the hole reduce the volume
water leaving the tank per second to cA, V2gh, where c (0 <c< 1) is an empirical constant.
A tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (Assume the removed apex of the cone is of negligible height and
volume.)
(a) Suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. The differential equation governing the height h in feet of water leaking from a tank after
seconds is
dh
= -
dt
In this model, friction and contraction of the water at the hole are taken into account with c = 0.6, and g is taken to be 32 ft/s2. See the figure below.
8ft
20 ft
`circular hole
Solve the initial value problem that assumes the tank is initially full.
h(t) =
Transcribed Image Text:Suppose water is leaking from a tank through a circular hole of area A, at its bottom. When water leaks through a hole, friction and contraction of the stream near the hole reduce the volume water leaving the tank per second to cA, V2gh, where c (0 <c< 1) is an empirical constant. A tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (Assume the removed apex of the cone is of negligible height and volume.) (a) Suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. The differential equation governing the height h in feet of water leaking from a tank after seconds is dh = - dt In this model, friction and contraction of the water at the hole are taken into account with c = 0.6, and g is taken to be 32 ft/s2. See the figure below. 8ft 20 ft `circular hole Solve the initial value problem that assumes the tank is initially full. h(t) =
b) Suppose the tank has a vertex angle of 60° and the circular hole has radius 4 inches. Determine the differential equation governing the heighth of water. Use c = 0.6 and g = 32 ft/s?
dh
dt
Solve the initial value problem that assumes the height of the water is initially 11 feet.
h(t) =
If the height of the water is initially 11 feet, how long (in minutes) will it take the tank to empty? (Round your answer to two decimal places.)
minutes
Transcribed Image Text:b) Suppose the tank has a vertex angle of 60° and the circular hole has radius 4 inches. Determine the differential equation governing the heighth of water. Use c = 0.6 and g = 32 ft/s? dh dt Solve the initial value problem that assumes the height of the water is initially 11 feet. h(t) = If the height of the water is initially 11 feet, how long (in minutes) will it take the tank to empty? (Round your answer to two decimal places.) minutes
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