Answer:
10.13
Explanation:
take note that velocity is distance over time () so you do 456(distance)÷45(time)= 10.13
Using the videos and websites provided, or other online resources you find, and analyze the events of the Biosphere 2 story and
2 answers:
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(1) The critical angles for the fused quartz is 44⁰,
(2) The critical angles for the polystyrene is 39⁰.
(3) The critical angles for the sodium chloride is 41⁰.
<h3>What is Critical angles?</h3>In optics, the critical angle is the topmost angle at which a shaft of light traveling in one transparent medium can strike the boundary between that medium and another with a lower refractive indicator without being fully reflected within the first
Critical angles for the different medium.
θ
where;
is the refractive index of air = 1
is the refractive index of the given substances.
Refractive index of quartz glass = 1.46
Refractive index of polystyrene = 1.59
Refractive index of sodium chloride = 1.54
Critical angles for quartz glass:
Critical angles for polystyrene
Critical angles for Sodium Chloride
Thus, the critical angles for the quartz glass is 44⁰, the critical angles for the polystyrene is 39 ⁰ and the critical angles for the sodium chloride is 41⁰.
To know more about critical angle visit:
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I understand that the question you are looking for is:
"For light of wavelength 589 nm, calculate the critical angles for the following substances when surrounded by air.
(a) Fused Quartz
(b) Polystyrene
(c) Sodium chloride"
Answer:
Not the right answer in the options, speed is 4.47 m/s, and the procedure is coherent with option A
Explanation:
Answer A uses mass and velocity units, which are momentum units. By using the conservation of momentum:
.
Since Tom stays in the raft, then both are moving with the same speed. From the options, the momentum is in agreement with option A, however, the question asks for speed.