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VMariaS [17]
3 years ago
9

While walking past a construction site, a person notices a pipe sticking out of a second floor window with water pouring out. As

the water flows to the ground, it speeds up due to the effect of gravity. How does the diameter of the flowing stream of water change as it descends? Assuming that the flow remains laminar, its diameter decreases. stays the same. increases.
Physics
1 answer:
sukhopar [10]3 years ago
8 0

Answer:

The flow diameter decreases.

Explanation:

From continuity equation,

Q = AV = constant

Where A is the area of the pipe which is proportional to its diameter.

V is the velocity of flow of fluid.

Q is the flow rate.

Let us consider the flow rate through the pipe. Assuming a steady state flow, if the velocity should increase, then the diameter will decrease.

For the flow leaving the pipe and descending to the floor, the flow is accelerated under gravity as it leaves the pipe. This acceleration causes its velocity to increase and consequently causing a reduction in the flow area. The result is the narrowing of the water that flows towards the floor (provided the flow remains laminar).

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Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.In a particular experi
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The number of electrons emitted from the metal per second increases if the intensity of the incident light is increased.

Answer: Option B

<u>Explanation:</u>

As a result of photoelectric effect, electrons are emitted by the light incident on a metal surface. The emitted electrons count and its kinetic energy can measure as the function of light intensity and frequency. Like physicists, at the 20th century beginning, it should be expected that the light wave's energy (its intensity) will be transformed into the kinetic energy of emitted electrons.

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3 years ago
Sound waves with frequency higher that 20,000 Hz are referred to as
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4 0
3 years ago
Saatlemati
vodomira [7]

Answer:

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3 0
3 years ago
The frequency of a wave is 560 Hz. What is it’s period
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Two masses are attracted by a gravitational force of 7 N.
damaskus [11]

Answer:

The answer to your question is: F  = 0.4375 N. The force will be 16 times lower than with the first conditions.

Explanation:

Data

F = 7 N

F = ?  if the masses is quartered

Formula

F = \frac{Km1m2}{r2}

Process

Normal conditions F = Km₁m₂/r²  = 7              

When masses quartered        F = K(m₁/4)(m₂/4)/r²  = ?

                                                F = K(m₁m₂/16)/r²

                                                F = K(m₁m₂/16r²      = 7/16  = 0.4375 N

3 0
3 years ago
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