3 years ago

The mass of proton is 1.67x10 kg. How many protons will make a mass of 1,00kg? 1011

Physics

1 answer:

MaRussiya [10]3 years ago

6 0

Answer: 938

Explanation:

1.67x10^-27kg (938V/c2)

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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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2 years ago

Explain why water boiling in a container stops<br>boiling momentarily when the lid is removed

Dmitriy789 [7]

Answer:

It's because it tips over the threshold from nucleate boiling, which we can see, to convection boiling, which we can't. ... Even if the steam stayed in the pot, it would still stop boiling when you removed the heat. The steam and water in a liquid/vapour mixture are at the same temperature (100ºC).

Explanation:

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3 years ago

Select the correct answer.

lawyer [7]

I believe the answer is C

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2 years ago

Which is NOT an INHERITED TRAIT?

Tcecarenko [31]

The answer is holes in leaves that were made by insects

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