To determine the number of photons emitted per second, we need data on the total power of the system and the total energy of the photons. We determine the power by multiplying the total area to the intensity of the sunlight given. We do as follows:
Power = 0.50 kW / m^2 ( π (0.001^2)) = 1.57x10^-6 kW = 1.57x10^-3 W
The energy of the visible light can be calculated from the expression:
Energy = hc / wavelength
where h is the planck's constant and c is the speed of light
Energy = (6.63 x 10^-34) (3 x 10^8) / 550 x 10^-9
Energy = 3.62 x 10^-19 J
Number of photons per second = 1.57x10^-3 J/s / 3.62 x 10^-19 J
Number of photons per second = 4.34x10^15
Particles similar to a water wave will travel away from the source. On the Earth's surface this would be shown as an aftershock. On the surface of water, the waves would travel in ripples.
The solution for this problem is through this formula:Ø = w1 t + 1/2 ã t^2
where:Ø - angular displacement w1 - initial angular velocity t - time ã - angular acceleration
128 = w1 x 4 + ½ x 4.5 x 5^2 128 = 4w1 + 56.254w1 = -128 + 56.25 4w1 = 71.75w1 = 71.75/4
w1 = 17.94 or 18 rad s^-1
w1 = wo + ãt
w1 - final angular velocity
wo - initial angular velocity
18 = 0 + 4.5t t = 4 s
Answer:
Explanation:
Given
Capacitance
Resistance
Inductance
In LCR circuit, current is maximum at resonance frequency i.e.
Insert the values
Also, frequency is given by
Explanation:
here's the answer, shouldn't be too hard to get the rest now!
4. f
5. t
6. t
7. t
8. f
9. t
10. f