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ValentinkaMS [17]
3 years ago
11

Onsider a ball at rest in the middle of a toy wagon. when the wagon is pulled forward, what happens to the ball? why?

Physics
1 answer:
zaharov [31]3 years ago
4 0
It moves back because if the wagon moves forw
ard the energy of the ball moves backward
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When viewing a piece of art that is behind glass, one often is affected by the light that is reflected off the front of the glas
Elza [17]

Answer:

  t = 9.16 10⁻⁸ m

Explanation:

In this exercise we fear a case of interference by reflection,

We have two aspects

* when the light ray passes from the air to the TiO2 that has a higher refraction start, the reflected ray has a phase change of 180º

* when the beam is inside the material its wavelength changes

            λₙ = λ₀ / n

with these two done the equation for destructive interference remains

           2t = m  λₙ

           2nt = m λ₀

They ask us for the thickness t of the film for m = 1

           t = m λ₀ / 2n

let's calculate

          t = \frac{1 \ 480 1 10^9 }{2 \ 2.62}

          t = 9.16 10⁻⁸ m

5 0
3 years ago
Suppose an earthquake occurs on an imaginary planet. Scientists on the other side of the planet detect primary waves but not sec
MrMuchimi

Answer:

a. part of the planet's interior is liquid

Explanation:

Seismic waves are slowed down in a liquid medium. On earth, molten areas reduces the speed of P waves and completely stops S waves which have shearing motion that can only be transmitted through a solid

The motion has the highest speed in materials, allowing it to be detected first on seismograms. The P wave is has a smaller wavelength and a higher frequency than the surface ans the S waves.

4 0
3 years ago
Calculate the mean free path of air molecules at a pressure of 7.00×10^−13 atm and a temperature of 303 K . (This pressure is re
Grace [21]

Answer:

82.8986 km

Explanation:

Given:

Pressure = 7.00×10⁻¹³ atm

Since , 1 atm = 101325 Pa

So, Pressure = 7.00×10⁻¹³×101325 Pa = 7.09275×10⁻⁸ Pa

Radius = 2.00×10⁻¹⁰ m

Diameter = 4.00×10⁻¹⁰ m (2× Radius)

Temperature = 303 K

The expression for mean free path is:

\lambda (Mean\ free\ path)=\frac {K (Boltzmann\ Constant)\times Temperature}{\sqrt {2}\times \pi\times (Diameter)^2\times Pressure}

Boltzmann Constant = 1.38×10⁻²³ J/K

So,

\lambda (Mean\ free\ path)=\frac {1.38\times 10^{-23}\times 303}{\sqrt {2}\times \frac {22}{7}\times (4.00\times 10^{-10})^2\times 7.09275\times 10^{-8}}

<u>Mean free path = 82.8986×10³ m = 82.8986 km</u>

4 0
4 years ago
What does the force diagram look like for a book at rest on a desk?
Sever21 [200]
An arrow representing the weight of the book acts downwards on the table. An arrow of equal magnitude, but opposite direction represents the normal reaction force of the table on the book.
7 0
3 years ago
With increasing depth, the temperature within earth
hoa [83]

Answer: im pretty sure it increases

Explanation:

4 0
3 years ago
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