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3 years ago

6. As the sky diver's fall theenergy is converted into _.

Physics

1 answer:

notka56 [123]3 years ago

3 0

Answer: B

D makes no sense because energy is created so we can remove that. C also makes no sense because if energy is not created how did it get destroyed if there's no energy in the first place. This leaves us with a and B the correct answer is B because energy is created and cannot be destroyed.

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Lenses are often coated with magnesium fluoride (refractive index n = 1.38) to reduce reflections. How thick should the layer of

Valentin [98]

Answer: 99.64 nm (≅ 100 nm)

Explanation: In order to explain this problem we have to obtain destructive inteference from two waves that reflect in the film and lens surface so both waves have a λ/2 shift then we have to get a difference path (2L) equal to an odd number of the half wavelegth.

Then we have the following expression:

L=(m+1/2)* λ/(2*n2); where n2 is the refractive index of the coating

for m=0 we have the minimum thickness for the coating

L=λ/(4*n2)=99.64 nm (≅ 100 nm)

6 0

3 years ago

A human hair is approximately 56 µm in diameter.

Ann [662]

Answer:

The diameter is 0.000056 m

Explanation:

Lets explain the relation between the meter and the micrometer

1 Meter is equal to 1000000 (one million) micrometers

1 micrometer = $\frac{1}{1000000}=\frac{1}{10^{6}}=10^{-6}$

The symbol of the meter is m

The symbol of micrometer is μm

A human hair is approximately 56 µm in diameter

We need to express this diameter in meter

To do that we divide this number by 1,000,000 or multiply it by $10^{-6}$

→ $\frac{56}{1000000}=0.000056$ 56 µm = 0.000056 m

→ OR

→ $56*10^{-6}=0.000056$

→ 56 µm = 0.000056 m

<em>The diameter is 0.000056 m</em>

4 0

4 years ago

According to the law of conservation of momentum, when objects collide in the absence of friction

Sav [38]

Answer:

<h3>When two objects collide, in the absence of any additional external forces acting on the pair of objects, momentum is conserved precisely because the collision is just an interaction between the two objects. That is, it's a Newton's third law problem.</h3>

7 0

2 years ago

While filming an intense action sequence for the next James Bond movie, a controlled explosion detonates 1.1 km away from the ac

kolezko [41]

Answer:

The time that will pass between the feeling and hearing the explosion is 2,86 secs

Explanation:

First, let's calculate the time that the wave takes to travel until the actors feel the explosion:

$1,1 km*\frac{1.000 mts}{1 km} *\frac{sec}{3.000 mts} = 0,37 secs$

Now, the time that pass while the actors hear the sound is:

<em>(Remember that the sound speed in the air is 340 m/s on average)</em>

$1,1 km * \frac{1.000 mts}{1 km} * \frac{sec}{340 mts} = 3,23 secs$

So, the time between the feeling and hearing is 3,23 - 0,37 = 2,86 secs

4 0

4 years ago

Is Solar Energy renewable? Why or why not? Use in your own words.

ella [17]

Answer:

Solar energy is renewable.

Explanation:

If something is renewable, it is generated faster than it can be reasonably used or won't run out for longer than it would be used. Solar falls into the latter category. Using solar panels won't deplete the sun and the sun will likely be around for much longer than we will.

3 0

3 years ago

6. As the sky diver's fall the______energy is converted into _______.

6. As the sky diver's fall theenergy is converted into _.