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Bezzdna [24]
2 years ago
7

3. A class took a field trip to a music studio. The students watched through thick glass as the musicians played

Physics
1 answer:
liq [111]2 years ago
5 0

Answer:

Sound can't travel in a vaccum.

Explanation:

Sound waves need a medium in order to travel (e.g. air, water, glass)

Since there was a vaccum between the glass the sound couldn't travel since vaccum's contain a very small amount of atoms.

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7. A beam of light converges at a point P. Now a lens is placed in the path of the convergent
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Answer:

Lens at a distance = 7.5 cm

Lens at a distance = 6.86 cm  (Approx)

Explanation:

Given:

Object distance u = 12 cm

a) Focal length = 20 cm

b) Focal length = 16 cm

Computation:

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b.  1/v = 1/u + 1/f

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Lens at a distance = 6.86 cm  (Approx)

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Answer:

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Part (b) :

We can say a body is non-uniform acceleration if the acceleration of the body varies with respect to time throughout its motion.

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