Question

In: Physics

Problem 34.30The sun has a power output of 3.83 × 1026 W.Part AHow...


Problem 34.30

The sun has a power output of 3.83 × 1026 W.

Part A

How many photons does the Sun emit each second? Assume that the average value of the wavelength of light emitted by the sun is 500 nm.

N =photons per second

Part B

Installed on your roof is a solar panel that has a surface area of 1.90 m2. How many photons from the Sun reach the panel? Assume in this part that the average value of the wavelength of light is 580 nm. Assume also that the sun emits photons equally in all directions and that photons are not scattered or absorbed by atmosphere on their way to the panel. Use the average Earth-Sun distance.

Solutions

Expert Solution


Related Solutions

What is the total power output of our Sun (i.e. the energy output per second)? (a)...
What is the total power output of our Sun (i.e. the energy output per second)? (a) Assume all of power is released from nuclear reactions, how much mass is the Sun currently losing every second? (b) how many years would it take for the sun to lose 1% of its total mass, if it keeps losing mass at the current rate?
How can I see that the the luminosity of the sun is 3.828×1026 W by looking...
How can I see that the the luminosity of the sun is 3.828×1026 W by looking at the HR diagram?
The Sun radiates energy at a rate of about 4 × 1026 W. 1) At what...
The Sun radiates energy at a rate of about 4 × 1026 W. 1) At what distance from the Sun is its intensity the same as that of a 100 W light bulb 1 m away from you? 2) How does that compare to the distance between the Sun and the Earth? 3) Between which 2 planets’ orbits does this distance lie?
A nuclear power plant has an overall efficiency of 31% and a power output of 800MW....
A nuclear power plant has an overall efficiency of 31% and a power output of 800MW. For one year operating at full capacity, calculate a) the number of joules produced; b) the number of fission events that were required to produce those joules; c) the mass of uranium oxide (UO2) that has been used in fission; and d) the market cost of that uranium oxide if it was all high quality.
A steam power plant has two turbines in series which together develop a power output of...
A steam power plant has two turbines in series which together develop a power output of 25MW. The boiler supplies steam at 80 bar, 500°C to the high-pressure turbine in which there is an enthalpy drop of 420 kJ/kg. The exhaust from the high pressure is at a pressure of 15 bar, at which pressure some of the steam is delivered to an open-type feedwater heater while the remainder is reheated to 450°C. The steam from the reheater is expanded...
Prob.1) Consider a combined gas and steam power plant that has a net power output of...
Prob.1) Consider a combined gas and steam power plant that has a net power output of 450 MW. The pressure ratio of the gas turbine cycle is 14. Air enters the compressor at 300 K and the turbine at 1 400 K. The combustion gases leaving the gas turbine are used to heat the steam to 8 MPa. up to 400 ° C in a heat exchanger. The combustion gases exit the heat exchanger at 460 K. An open feedwater...
A combined gas turbine–vapor power plant has a net power output of 200 MW. Air enters...
A combined gas turbine–vapor power plant has a net power output of 200 MW. Air enters the compressor of the gas turbine at 300 kPa, 1200 K, and is compressed to 1000 kPa. The pressure ratio of the gas turbine cycle is 11. Steam leaving the turbine of the vapor power cycle are used to heat the steam at 6 MPa to 350C in a heat exchanger. The combustion gases leave the heat exchanger at 420 K. An open feedwater...
A pointer laser has an average output power of 0.9 mW and a beam diameter of...
A pointer laser has an average output power of 0.9 mW and a beam diameter of 1.2 mm. (a) What is the force exerted by the laser beam on a perfectly reflecting surface ? (b) Is this force much larger, smaller, or about the same compared to the weight of a 0.1 gram drop of water ( 1x10-4x9.8 = 9.8x10-4 Newton ) (c) What is the rms electric field produced by this laser ?
Problem 4. A high-voltage power supply should have a nominal output voltage of 350 V. A...
Problem 4. A high-voltage power supply should have a nominal output voltage of 350 V. A sample of four units is selected each day and tested for process-control purposes. The data (see sheet Problem4 in Homework 4.xlsx) give the difference between the observed reading on each unit and the nominal voltage times ten; that is, ?? = (observed voltage on unit ? - 350)*10 (a) Set up ?̅ and ? charts on this process. Is the process in statistical control?...
A sound wave has a propagation speed of 349 m/s, a frequency 1026 Hz, and has...
A sound wave has a propagation speed of 349 m/s, a frequency 1026 Hz, and has a maximum displacement of ym= 3.02x10-7 m. At time t= 0, and x= 0, the displacement is ym = 1.00x10-7 m. (a) Using these values, find an equation of form:            y(x,t) = ym sin(kx - ωt + ϕ) (b) Differentiate the expression and find the maximum speed of the oscillating air molecules. (c) Find the maximum magnitude of acceleration of the...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT