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KatRina [158]
3 years ago
13

Which of the following is a true statement?a) 390 nm blue light is higher in energy than 610 nm yellow light.b) Visible light is

higher in energy than ultraviolet light.c) Light at a frequency of 1014/s is lower in energy than light at a frequency of 1010/s.d) All of these are true.
Physics
1 answer:
ZanzabumX [31]3 years ago
6 0

Answer:

statement a is true

Explanation:

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What is the index of refraction of a material in which the speed of light is 7.50% slower than the speed of light in vacuum?
Inessa [10]

Answer:

The value is n = 1.081

Explanation:

From the question we are told that

   The speed of in a vacuum is c = 3.0 *10^{8} \  m/s

    The speed of light in the material is  v  =  c -0.075c = 0.925 c =  0.925 * 3.0*10^{8}  = 2.775 *10^{8} \ m/s

   Generally the reflection of the material is mathematically represented as

             n = \frac{c}{v}

=>    n = \frac{3.0*10^{8}}{2.775 *10^{8}}

=>    n = 1.081

8 0
3 years ago
A stone is thrown vertically upward with a speed of 18.0 m/s. How fast is it moving when it reaches a height of 11.0m? How long
steposvetlana [31]
Given: v0= 18.0 m/s, y0=0m, yf=11m, g=-9.81 m/s^2 

v0= initial velocity, vf= final velocity, y0= initial height, yf= final height, g= gravity, sqrt()= square root, ^2=squared 

vf^2=v0^2 + (2)(g)(yf-y0) 
vf^2=(18.0 m/s)^2+(2)(-9.81 m/s^2)(11 m-0m) 
vf^2=18.0 m/s)^2 + (-19.62 m/s^2)(11 m)
vf^2=(324 m^2/s^2) - (215.82 m^2/s^2) 
vf^2=108.18 m^2/s^2 
vf=sqrt(108.18 m^2/s^2) 
vf=10.4 m/s
8 0
3 years ago
If tony uses a force of 1525 N to drive his car a distance of 381 m, how much work is done on his car?
shepuryov [24]

Hello!!

For calculate the work let's applicate the formula:

\boxed{W=Fd}

\textbf{Being:}

\sqrt{} W = Work = ?

\sqrt{} F = Force = 1525 N

\sqrt{} d = Distance = 381 m

⇒ \text{Then let's \textbf{replace it according} we information:}

W = 1525 N * 381 m

⇒ \text{Let's resolve it: }

W = 581025 J

\textbf{Result:}\\\text{The work is \textbf{581025 Joules}}

3 0
3 years ago
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Which best describes friction?
tangare [24]

Answer:

a constabt force that acts on object that rub together

Explanation:

It is because Friction is the rubbing of one body against another body

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2 years ago
Why are Physical changes Not represented by Equations
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Badadadadadadadadaradad
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