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zzz [600]
3 years ago
6

True or false? Please help me !

Physics
1 answer:
liberstina [14]3 years ago
7 0

Answer:

They may not all be acurate

Explanation:

16. True (I think)

17.True

18.False (I think)

19.True

20.True

21.False

22.True

23. True

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An Argon laser (λ = 5.0×102nm) shines down a silica glass fiber-optic cable with index of refraction 1.46. What is the speed of
Yanka [14]

Answer:

The speed of the laser light in the cable, c_f=2.1\times 10^8\ m/s

Explanation:

It is given that,

Wavelength of Argon laser, \lambda=5\times 10^2\ nm=5\times 10^{-7}\ m

Refractive index, n = 1.46

Let c_f is the speed of the laser light in the cable. The speed of light in a medium is given by :

c_f=\dfrac{c}{n}

c_f=\dfrac{3\times 10^8\ m/s}{1.46}

c_f=2.05\times 10^8\ m/s

or

c_f=2.1\times 10^8\ m/s

So, the speed of the laser light is 2.1\times 10^8\ m/s. Hence, this is the required solution.

4 0
4 years ago
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When does the potential energy of a swinging pendulum increase the most?
xxTIMURxx [149]
Maybe this can help:

https://blogs.bu.edu/ggarber/interlace/pendulum/energy-in-a-pendulum/
3 0
3 years ago
Which of the following electromagnetic waves has the shortest wavelength?
mamaluj [8]
The human eye sees radio waves with a very short wavelength, which is another way of saying high-frequency waves. The word "ultra" should queue you in that ultraviolet waves are higher frequency than just violet waves. Violet is sorta purplish or blueish, which is the highest frequency or "color" that our eyes can see. So ultraviolet is higher frequency than visible light, which is the same thing as "color." On the other hand, red is the lowest frequency or highest wavelength that our eyes can see. And "Infra" means lower than red, so, infrared waves are "colors" or frequencies, smaller than visible light. To determine where microwaves fall under look up "Electromagnetic Spectrum." Good luck!
5 0
3 years ago
1 second<br> What is the frequency of this wave?<br> O 1<br> 02<br> O 3<br> O4
ankoles [38]

Answer:

Option (1) f = 1

Explanation:

Formula for Frequency (F) = 1/t where t = Time in seconds.

F = 1/1

F = 1 hz ( hz or hertz is the unit for Frequency ).

6 0
2 years ago
As an apple falls from a tree, which types of energy are changing?
GarryVolchara [31]

Answer:

D: Gravitational potential energy and kinetic energy

Explanation:

When an object (in your case an apple) has gravitational potential energy, it is still but has potential energy which is stored energy. As it falls, that potential energy transfers into kinetic energy.

3 0
3 years ago
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