The brightening of the night sky by light scattered from artificial outdoor lighting is called answer

1 answer:

kondor19780726 [428]3 years ago

7 0

The brightening of the night sky by light scattered from artificial outdoor lighting is called <span>Light Pollution</span>

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he measured flow rate of water through a 20 mm diameter pipe is 75 L/min. What is the average velocity (in m/s) of water flowing

Masteriza [31]

Answer:

Average velocity of water flow through the pipe = 3.98 m/s

Explanation:

Diameter of pipe = 20 mm

Discharge = 75 L/min

We know that

Discharge = Area x Velocity

$\texttt{Area of pipe}=\frac{\pi d^2}{4}=\frac{\pi \times (20\times 10^{-3})^2}{4}=3.14\times 10^{-4}m^2$

Discharge = 75 L/min

$=\frac{75\times 10^{-3}}{60}=1.25\times 10^{-3}m^3/s$

Substituting

$1.25\times 10^{-3}=3.14\times 10^{-4}\times V\\\\V=3.98m/s$

Average velocity of water flow through the pipe = 3.98 m/s

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Answer: yes u can use a 6.75 when measuring the pencil

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Unit Test

irina [24]

Neutrons

Explanation:

Atoms of the same elements are called isotopes. They differ from other atoms in the number of neutrons they posses. They share the same chemical properties but only differ with regards to their mass number.

Isotopy is a phenomenon whereby an atom of an element exist in more than one form but they have the same atomic number.
Atoms of such element only differ in the number of neutrons they contain.
Since the mass number of an atom is the sum of protons and neutrons, they differ in this number too
Isotopes have the same chemical properties.

learn more:

Isotopes brainly.com/question/10862182

#learnwithBrainly

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Airborne objects tend to curve to the right

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