Answer:
all of the above
Explanation:
they all require speed to beat
Answer:
(A) v2 = 17.7 m/s
(b) diameter = 1.73 mm
Explanation:
height of hole below the water level (h2) = 16 m
rate of flow (V) = 2.5 x 10^{-3} m^{3} / min = 4.17 x 10^{-5} m^{3}/s
(A) applying Bernoulli's theorem we can determine the speed of the water at the hole
where
p1 = pressure at the top surface
ρ = density of water
g = acceleration due to gravity = 9.8 m/s
v1 = velocity at the top
h1 = height at the top
p1 = pressure at the top surface
p1 = pressure at the hole
v2 = velocity at the hole
h2 = height of the hole from the top
- p1 and p2 are under atmospheric pressures and are hence both equal in magnitude to the atmospheric pressure (patm)
- the area of the top surface is very large compared to the area of the hole, hence velocity at the top v1 is very small compared to the velocity at the hole v2 hence the velocity at the top is negligible
- let the height of the top be L and the height of the hole from the top be L - 16
- applying this considerations to the equation we have
v2 =
v2 =
v2 = 17.7 m/s
(B) area = rate of flow / velocity
area =
area =
area = π()
diameter =2(
diameter =2(
diameter = 1.73 x 10^{-3} m = 1.73 mm
Answer:
well, in my view,
In fluid mechanics, hydrostatic equilibrium or hydrostatic balance (also known as hydrostasy) is the condition of a fluid or plastic solid at rest. This occurs when external forces such as gravity are balanced by a pressure-gradient force.
Light striking the walls of the glass cylinder and reflecting in inside tube itself is a phenomenon known as total internal reflection.
<h3>What word best describes reflection, in your opinion?</h3>
Reflection is often synonymous with the verbs cogitate, contemplate, reason, hypothesize, and think. All of these expressions mean "using one's intellect, judgment, or inference faculties," but the word "reflect" means carefully considering a recollection.
<h3>What does it mean to give reflection some thought?</h3>
constant verb When you ruminate, you seriously consider something. Alternatives include thinking, analyzing, planning, and thinking. More phrases containing "reflect" Reflecting feelings is the act of observing a person's verbal and nonverbal signs for their emotions and feelings, then immediately communicating (or reflecting) those attitudes to the user or customer.
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The amount of energy transferred is 4320 J
Explanation:
Power is defined as the amount of energy transferred per unit of time:
where
P is the power
E is the amount of energy transferred
t is the time
In this problem, we have:
P = 720 W is the power
t = 6 s is the time elapsed
Solving for E, we find the energy transferred needed to push the box:
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