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sergij07 [2.7K]
3 years ago
15

Saatlemati

Physics
1 answer:
vodomira [7]3 years ago
3 0

Answer:

what are u asking there isnt a question

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In a physics lab, light with a wavelength of 490 nm travels in air from a laser to a photocell in a time of 17.5 ns . When a sla
Gennadij [26K]

Answer:

196 nm

Explanation:

Given that

Value of wavelength, = 490 nm

Time spent in air, t(a) = 17.5 ns

Thickness of glass, th = 0.8 m

Time spent in glass, t(g) = 21.5 ns

Speed of light in a vacuum, c = 3*10^8 m/s

To start with, we find the difference between the two time spent

Time spent on glass - Time spent in air

21.5 - 17.5 = 4 ns

0.8/(c/n) - 0.8/c = 4 ns

Note, light travels with c/n speed in media that has index of refraction

(n - 1) * 0.8/c = 4 ns

n - 1 = (4 ns * c) / 0.8

n - 1 = (4*10^-9 * 3*10^8) / 0.8

n - 1 = 1.2/0.8

n - 1 = 1.5

n = 1.5 + 1

n = 2.5

As a result, the wavelength of light in a medium with index of refraction would then be

490 / 2.5 = 196 nm

Therefore, our answer is 196 nm

6 0
4 years ago
The molecular mass of CO2.
mylen [45]

Answer:

the molrcular mass of carbon dioxide id 44.01amu

Explanation:

plz make me brainliest

4 0
3 years ago
Read 2 more answers
Select an incorrect statement relating to a Carnot cycle operating on a gas. A) Each process is a reversible process. B) work oc
nekit [7.7K]

Answer:

B)

D)

Explanation:

Carnot cycle ;

  This is the ideal cycle for all type of heat engine.All the process in the Carnot cycle is reversible processes ( those process does not leave any effect on the system as well as surrounding when the process is  reversed  is known as reversible process).It have four process in which two process is constant temperature and other two is isentropic or we can say that reversible adiabatic.

In the two process(constant temperature) only heat interaction take places and other two process(adiabatic) only work interaction take places.

So the option B and D is incorrect for Carnot cycle.

4 0
3 years ago
What would happen if there were no action-reaction forces in effect and you tried walking down a sidewalk
Tema [17]
B,son z. skiff us. i, is kzizojz have finally deodorant k I, I co.os xj dc
7 0
4 years ago
A 14-kg dog jumps up in the air to catch a ball. The dog's center of mass is normally 0.20 m above the ground, and he is 0.50 m
TEA [102]

Answer:

1.29 m

Explanation:

Net force acting on the dog, F_net will be given by

F_net=F_upward – F_downward=2.1F_g –F_g=2.1mg-mg=1.1(mg) where m is mass and g is acceleration due to gravity

Since the work done by the net force against the ground equals the final potential energy

\triangle W=\triangle PE

F_net \triangle x=mg(\triangle y)

1.1mg(x-\hat x)= mg(\triangle y)

1.1(x-\hat x)=\triangle y

1.1(0.5 m-0.1 m)=\triangle y

1.1(0.4 m) =\triangle y

\triangle y =0.44 m

Height which the dog can jump, h=x+\triangle y

H=0.6+0.44=1.04 m

Total height to reach=Height to jump+ half height of the dog

=1.04 m+0.5(0.5 m)=1.29 m

8 0
3 years ago
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