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Lemur [1.5K]
3 years ago
11

Why do astronauts feel weightless in space?

Physics
1 answer:
JulsSmile [24]3 years ago
6 0
Weight = mass × gravitational field strength
At space gravitational field strength is very low so its"weightless".
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The linear expansivity of metal P is twice that of another metal Q. When these materials are heated through the same temperature
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Why is there no effect on other branches in a paral- lel circuit when one branch of the circuit is opened or closed?
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Explanation:

As the circuit is parallel, then there is no effect of other branches as the potential difference across each arm is same.

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The electron beam inside a television picture tube is 0.40 {\rm mm} in diameter and carries a current of 50 {\rm \mu A}. This el
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A scientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surf
Sati [7]

Answer:

a) The minimum thickness of the oil slick at the spot is 313 nm

b) the minimum thickness be now will be 125 nm

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Given the data in the question;

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t_{min = λ/2n

given that; wavelength λ = 750 nm and  index of refraction of the oil n = 1.20

we substitute

t_{min = 750 / 2(1.20)

t_{min = 750 / 2.4

t_{min = 312.5 ≈ 313 nm

Therefore, The minimum thickness of the oil slick at the spot is 313 nm

b)

Suppose the oil had an index of refraction of 1.50. What would the minimum thickness be now?

minimum thickness of the oil slick at the spot will be;

t_{min = λ/4n

given that; wavelength λ = 750 nm and  index of refraction of the oil n = 1.50

we substitute

t_{min = 750 / 4(1.50)

t_{min = 750 / 6

t_{min = 125 nm

Therefore, the minimum thickness be now will be 125 nm

4 0
3 years ago
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