<u>Given</u>:
Wavelength (λ) of the laser pulse = 545 nm = 5.45 * 10⁻⁹ m
Total energy of pulse = 4.85 mJ
<u>To determine:</u>
The number of photons in the laser of a given energy
<u>Explanation:</u>
Energy per photon (E) = hc/λ
where h = planck's constant = 6.626 *10⁻³⁴ Js
C = speed of light = 3*10⁸ m/s
λ = wavelength
E = 6.626 *10⁻³⁴ Js* 3*10⁸ms-1 /5.45 * 10⁻⁹ m = 3.65 * 10⁻¹⁹ J
Now,
# photons = total energy/Energy per photon
= 4.85 * 10⁻³ J* 1 photon / 3.65 * 10⁻¹⁹ J = 1.32 * 10¹⁶ photons
Ans: the laser pulse contains 1.32 * 10¹⁶ photons
Eating too much lipids is hazardous to the health. It has a lot of negative effects. One is cardiovascular complications, too much of lipids can cause high blood cholesterol, arterial hardening, heart diseases and stroke. Also, obesity is possible. Eating too much lipids is associated with metabolism abnormalities.
Answer:
answer A because it's not sustainable and it is overfishing a population
<span>Boyle's Law is
P1 * V1 = P2 * V2.
Let's calculate the pressure of Gas A
P1 = 2.5 V1 = 762
P2 = ? and V2 = 762 + 149 = 911
So P2 = P1 * V1/V2 = 2.5 * 762/ 911 = 2.091
Let's calculate the pressure of Gas B
P1 = 4.9 and V1 = 149
P2 = ? and V2 = 149 + 762 = 911
So P2 = P1 * V1/V2
P2 = 4.9 * 149/911 = 0.8014
From Dalton's law the resulting pressure = 0.8014 + 2.091 = 2.892</span>
