3 years ago

Explain why the boiling point of a liquid varies with atmospheric pressure

1 answer:

5 0

The boiling point of water, or any liquid, varies according to the surrounding atmospheric pressure. A liquid boils, or begins turning to vapor, when its internal vapor pressure equals the atmospheric pressure.

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What happen when a hurricane crosses over land

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It loses it's fuel supply from the water and begins to weaken

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Acid rain contributes to soil erosion. Acid rain can be caused by A. chemicals released into the air by motor vehicles B. drough

Gala2k [10]

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3 years ago

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A ball is revolving horizontally in a circle of radius 1.8 m, and is held by a rigid, massless rod. The mass of the ball is 0.1

OLga [1]

Answer:

$\omega=15 \ rad/s$

Explanation:

given,

radius of circle = 1.8 m

mass of the ball = 0.1 Kg

linear speed of the ball = 27 m/s

angular velocity of orbit = ?

$v = r \omega$

ω is the angular speed of the circle

$\omega=\dfrac{v}{r}$

$\omega=\dfrac{27}{1.8}$

$\omega=15 \ rad/s$

the angular velocity of the orbit is $\omega=15 \ rad/s$

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3 years ago

What is the frequency of a red laser beam, with a wavelength of 670 nm, which your astronomy instructor might use to point to sl

Papessa [141]

Answer:

The frequency of a red laser beam is $4.47\times 10^{14}\ Hz$ .

Explanation:

It is given that,

Wavelength of red laser beam, $\lambda=670\ nm=670\times 10^{-9}\ m$

We need to find the frequency of red laser beam. It can be calculated as :

$f=\dfrac{c}{\lambda}$

$f=\dfrac{3\times 10^8\ m/s}{670\times 10^{-9}\ m}$

$f=4.47\times 10^{14}\ Hz$

So, the frequency of a red laser beam is $4.47\times 10^{14}\ Hz$ . Hence, this is the required solution.

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eimsori [14]

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