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Ket [755]
3 years ago
5

Helium does not usually react with other substances. does this mean that helium has no chemical reactions

Physics
1 answer:
IRISSAK [1]3 years ago
4 0
Helium doesn't have chemical reactions it has to be in balloons and it doesn't affect gravity at all so that's why it not have a chemical reactions
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A tube with a cap on one end, but open at the other end, has a fundamental frequency of 130.8 Hz. The speed of sound is 343 m/s
sergey [27]

Answer:

Y = V / f      where Y equals wavelength

4 Y1 = V / f1       for a closed pipe the wavelength is 1/4 the length of the pipe

2 Y2 = V / f2   for the open pipe the wavelength is 1/2 the length of the pipe

Y1 / Y2 = 2 = f2 / f1      dividing equations

f2 = 2 f1  

the new fundamental frequency is 2 * 130.8 = 261.6

(The new wavelength is 1/2 the original wavelength so the frequency must double to produce the same speed.

8 0
3 years ago
When attempting to determine the coefficient of kinetic friction, why is it necessary to move the block with constant velocity
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Answer:

Explanation:

In order to measure the coefficient of friction , we apply external force to move the body . When external force comes in motion , we adjust the external force so that it moves with zero acceleration or uniform velocity . In this case external force becomes equal to kinetic frictional force and then net force becomes zero because

net force = mass x acceleration = m x 0 = 0

Now frictional force = μ mg where μ is coefficient of kinetic friction

so F = μ mg where F is external force applied

μ = F / mg

Hence , to make external force equal to frictional force , it is necessary to make acceleration of body zero .

4 0
3 years ago
Describe the relationship shown in each graph below
pochemuha

The distance decreases as the time increases

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3 years ago
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Two plastic balls suspended by strings are placed close to each other. If they have the same charge, how will they interact with
vampirchik [111]
<span>Two plastic balls suspended by strings are placed close to each other. If they have the same charge then they will repel each other.</span>
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3 years ago
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The default unit of rotational speed is 'radians per second' or 'rad/s'. If a someone sits at the edge of a 5m radius carousel a
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The rotational speed of the person is 0.4 rad/s.

<h3>Rotational speed (rad/s)</h3>

The rotational speed of the person in radian per second is calculated as follows;

v = ωr

where;

  • v is linear speed in m/s
  • r is radius in meters
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ω = v/r

ω = 2/5

ω = 0.4 rad/s

Thus, the rotational speed of the person is 0.4 rad/s.

Learn more about rotational speed here: brainly.com/question/6860269

7 0
2 years ago
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