1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nat2105 [25]
3 years ago
13

Calculate the energy of the lasers in a Blu-ray player, which emit at a wavelength of 4.05x10−7 m.

Chemistry
1 answer:
Komok [63]3 years ago
4 0

Answer:

4.907 × 10^-19 J

Explanation:

The energy of the lasers in a Blu-ray player can be calculated by using;

E = hf

Where;

E = Energy of laser (J)

h = Planck's constant (6.626 × 10^-34 J/s)

f = frequency (Hz)

However, the frequency must be known first in order to calculate the energy. The frequency can be calculated using the formula:

f = v/λ

Where:

λ = wavelength (4.05x10−7 m.)

v = speed of light (3 × 10^8m/s)

f = frequency (Hz)

f = 3 × 10^8 ÷ 4.05 x 10^−7

f = 0.7407 × 10^(8 + 7)

f = 0.7407 × 10^15

f = 7.407 × 10^14 Hz

Using E = hf

E = 6.626 × 10^-34 × 7.407 × 10^14

E = 49.07 × 10^(-34 + 14)

E = 49.07 × 10^-20

E = 4.907 × 10^-19 J

You might be interested in
Why does spilt petrol forms a slick on top of water
Marina CMI [18]
It does that because petrol is a liquid chemical,has a lower mass per volume,or density,then the water on top so it spread out on top of the water
7 0
3 years ago
A glacier recedes and exposes bare rock. Which of the following will most likely occur next?
timama [110]

The bare rock will erode, once it erodes the rock will no longer be bare cause eroded sediment will cover it.

6 0
3 years ago
Read 2 more answers
A 10.0-milliliter sample of NaOH(aq) is neutralized by 40.0 milliliters of 0.50 M HCl. What is the molarity of the NaOH(aq)?
Ludmilka [50]
\frac{10 mL}{1000 mL}  = 0.01 L

\frac{40mL}{1000mL} =0.04L

M _{1} V_{1}=M_{2}V_{2}

M_{1}(0.01)=(0.50)(0.04)

M_{1}(0.01)=0.02

M_{1}= \frac{0.02}{0.01}

M_{1}=2
3 0
4 years ago
A cylinder has a volume of 30 cubic centimeters. The gas inside is at a temperature of 420 K and a pressure of 110 kPa. Find the
oksian1 [2.3K]

Answer:

The answer to your question is T2 = 610.9 °K

Explanation:

Data

Volume 1 = V1 = 30 cm³

Temperature 1 = T1 = 420 °K

Pressure 1 = P1 = 110 kPa

Volume 2 = V2 = 40 cm³

Temperature 2 = T2 = ?

Pressure 2 = P2 = 120 kPa

Process

To solve this problem use the combined gas law.

               P1V1/T1 = P2V2/T2

-Solve for T2

               T2 = P2V2T1 / P1V1

-Substitution

                T2 = (120 x 40 x 420) / (110 x 30)

-Simplification

                 T2 = 2016000 / 3300

-Result

                   T2 = 610.9 °K

5 0
3 years ago
Show a numerical setup for calculating the number of moles in the sample of CaCO3
Delvig [45]

The numerical setup is

<span>11<span>g</span></span>CO2×1 mol CO2/44.01g CO2=0.25 mol CO2

gCO2 cancels out so it is

11 x 1 mol CO2/44.1 CO2= 0.25 mol CO2

6 0
4 years ago
Other questions:
  • Which is an example of a heterogeneous mixture? <br>A coffee<br>B soil<br>C gelatin<br>D air
    14·1 answer
  • A 0.2 m solution of a weak acid ha dissociates such that 99.4% of the weak acid remains intact (i.e., remains as ha). what is th
    15·1 answer
  • Why is helium nucleus containing no neutrons is likely to be unstable
    15·1 answer
  • Strong acids have a ______ value of Ka and the equlibrium for the reaction with water lies far to the _______.
    7·1 answer
  • What type of reaction is Al + 3CuSO4 --&gt; Al2(SO4)3 + 3 Cu
    11·1 answer
  • In Sir Isaac Newton's time in the early 1700s, what was the general consensus among scientists on the properties of light?
    5·2 answers
  • In the reaction a b c, doubling the concentration of a doubles the reaction rate and doubling the concentration of b does not af
    6·1 answer
  • Why are index fossils used to date other fossils in an area of rock
    6·1 answer
  • Any one know the answer for any questions of these ??
    15·1 answer
  • Saturated solution of an ionic compound has a
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!