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3 years ago

How freezing could be used to remove sugar from a mixture of sugar and water.

1 answer:

4 0

Answer - Put mixture in a freezer until ice crystals form. Pour off the remaining liquid . The ice can be melted and this process can be repeated to purify the water even more.

Hope this helps :)

Have a great day!

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If an hockeypuck slides on a perfectly frictionless surface it will eventually slow down because of its inertia ?

kobusy [5.1K]

The answer your looking for is false

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4 years ago

The propeller of a World War II fighter plane is 2.30 m in diameter. (a) What is its angular velocity in radians per second if i

Sergio [31]

Answer with Explanation:

We are given that

Diameter of fighter plane=2.3 m

Radius= $r=\frac{d}{2}=\frac{2.3}{2}=1.15 m$

a.We have to find the angular velocity in radians per second if it spins=1200 rev/min

Frequency= $\frac{1200}{60}=20 Hz$

1 minute=60 seconds

Angular velocity= $\omega=2\pi f$

Angular velocity= $2\times \frac{22}{7}\times 20=125.7 rad/s$

b.We have to find the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac.

$v=r\omega=1.15\times 125.7=144.56 m/s$

c.Centripetal acceleration= $\omega^2 r=(125.7)^2(1.15)=18170.56 m/s^2$

Centripetal acceleration== $\frac{18170.56\times g}{9.81}=1852.25 g m/s^2$

7 0

4 years ago

How<br> are<br> earthquakes measured quantitatively

AlexFokin [52]

Answer:Intensity: The severity of earthquake shaking is assessed using a descriptive scale – the Modified Mercalli Intensity Scale. Magnitude: Earthquake size is a quantitative measure of the size of the earthquake at its source. The Richter Magnitude Scale measures the amount of seismic energy released by an earthquake.

Explanation:

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3 years ago

Which microscope is used to see internal structures of cells in a natural state? darkfield microscope phase-contrast microscope

harkovskaia [24]

Answer:

Phase contrast microscope

Explanation:

It is used for viewing biological structures not visible under the microscope. It is used for viewing microrganisms live

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4 years ago

The distance from the Earth to the Sun is 92 868 000 miles.

ANEK [815]

Your answer can be either 92 900 000 or 9.29e+7

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3 years ago