3 years ago

Explain why you poured the water into water before you identify the smell ?

1 answer:

6 0

The dehydrated water had to be reconstituted by mixing it well
with water before its characteristic olfactory molecules could be
released and dispersed throughout the room to yield the familiar
heady bouquet.

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Explain the causes of atmospheric pressure and why it changes with altitude?

Verdich [7]

Answer:

As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude

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2 years ago

In which situation are the individual molecules moving the fastest ?

ch4aika [34]

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4 years ago

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Now the king had a grand-vizir who was avaricious, and envious, and a very bad man. He grew extremely jealous of the physician,

BlackZzzverrR [31]

<h2><em>He wants the king’s complete attention. </em></h2><h2><em> </em></h2><h2><em>He is afraid of someone pointing out the error of his false accusations. </em></h2><h2><em> </em></h2>

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3 years ago

What is the angular momentum at a radius of 2 m with an object of 5 kg at a<br> velocity of 20 m/s?

ahrayia [7]

Answer:

200

Explanation:

angular momentum=mvr

=2×5×20

= 200kgm2/s

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2 years ago

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A scientist makes a device to catch baseballs. A long bar of total mass 2.2kg and length 1.2m is fixed at its center. It catches

Valentin [98]

Answer:

ωf = 4.53 rad/s

Explanation:

By conservation of the angular momentum:

Ib*ωb = (Ib + Ic)*ωf

Where

Ib is the inertia of the ball

ωb is the initial angular velocity of the ball

Ic is the inertia of the catcher

ωf is the final angular velocity of the system

We need to calculate first Ib, Ic, ωb:

$Ib = mb*(L/2)^2=0.15*(1.2/2)^2=0.054 kg.m^2$

$Ic = mc/12*L^2=2.2/12*1.2^2=0.264 kg.m^2$

ωb = Vb / (L/2) = 16 / (1.2/2) = 26.67 m/s

Now, ωf will be:

$\omega f = \frac{Ib*\omega b}{Ib + Ic} = 4.53rad/s$

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3 years ago