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Feliz [49]
3 years ago
7

How fast do differnt parts of the em spectrum travel in a vaccuum

Physics
1 answer:
Black_prince [1.1K]3 years ago
7 0

All electromagnetic radiation ... all wavelengths, all frequencies ... has the
same speed, as long as you're measuring all through the same medium.

The speed is fastest in vacuum ... 299,792,458 meters per second.  It's
slower than that in any material, and different in every material.


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During the photoelectric effect experiment, a photon is emitted with 5.73 x10-20 J of kinetic energy. If the work function of th
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Answer:

Frequency of incident light = 995×10 12

Explanation:

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2 years ago
An expensive vacuum system can achieve a pressure as low as 1.00×10^{-7} N/m^2 at 20ºC . How many atoms are there in a cubic cen
marta [7]

Answer:

24.70818432141\times 10^7\ atoms

Explanation:

P = Pressure = 1\times 10^{-7}\ N/m^2

V = Volume = 1 cm³

n = Amount of substance

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N_A = Avogadro's constant = 6.022\times 10^{23}\ /mol

R = Gas constant = 8.314 J/k mol

T = Temperature = 273.15+20 = 293.15 K

From the ideal gas law

PV=nRT\\\Rightarrow n=\frac{PV}{RT}

n=\frac{N}{N_A}

\frac{N}{N_A}=\frac{PV}{RT}\\\Rightarrow N=N_A\times \frac{PV}{RT}\\\Rightarrow N=\frac{1\times 10^{-7}\times 1\times 10^{-6}}{8.314\times 293.15}\times 6.022\times 10^{23}\\\Rightarrow N=24708184.32141\ atoms=24.70818432141\times 10^7\ atoms

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8 0
3 years ago
14. Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenari
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In order to make things easier to describe and explain, let's call
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a).  In series, the total resistance is 3R.
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b).  In series, the total current is  V / (3R) .
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Changing from series to parallel, the total current in the circuit
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c).  In series, the power dissipated by the circuit is 

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In parallel, the power dissipated by the circuit is

                                   (V) · 3V/R  =  3V² / R .

Changing from series to parallel, the power dissipated by
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8 0
3 years ago
An element becomes a positively charged ion when it
Anuta_ua [19.1K]
An element becomes a + ion when it...loses electrons
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Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. Th
Dima020 [189]

Answer:

Explanation:

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So, λ = ( n - 1) t

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7 0
3 years ago
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