SERPSE10 33.3.OP.008.MI. 7. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In SI units, the electric field in an electromagnetic wave is described by Ey 118 sin(1.40 x 107x - wt). (a) Find the amplitude of the corresponding magnetic field oscillations. (b) Find the wavelength 1. m (c) Find the frequency f. Hz Need Help? Read It Master It Submit Answer SERPSE10 33.4.P.013. 8. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If the intensity of sunlight at the Earth's surface under a fairly clear sky is 1 255 W/m, how much electromagnetic energy per cubic meter is contained in sunlight? HJ/m Need Help? Read It Watch It Submit Answer SERPSE10 33.4.P.017.CTX. 9. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You are serving as an expert witness for the city council of a community. The council is exploring the concept of providing the electrical needs of the community by building a facility with photovoltaic cells to convert sunlight to electric potential energy. But they are facing resistance from members of the community, who claim that there is not enough open land in the community to build such a facility. The opposition is building toward a lawsuit, which the city council wants to avoid. The community requires 1.80 MW of power, and the best photovoltaic cells on the market at the time have an efficiency of 30.0%. In your community, an average intensity of sunlight during the day is 1,190 W/m. The council members have no idea how much land is needed, so they have asked you to estimate the area of land (in m) that must be found to construct this facility. (Assume the given average intensity of sunlight is only available for eight hours a day.) m Need Help? Read It Submit Answer 10. [-/1 Points] DETAILS SERPSE10 33.4.P.015. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER High-power lasers in factories are used to cut through cloth and metal (see figure below). One such laser has a beam diameter of 2.00 mm and generates an electric field having an amplitude of 0.450 MV/m at the target. (a) Find the amplitude of the magnetic field produced. MT (b) Find the intensity of the laser. MW/m (c) Find the power delivered by the laser. W Need Help? Read It Watch It Submit Answer 11. [-/1 Points] DETAILS SERPSE10 33.4.OP.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An AM radio station broadcasts isotropically (equally in all directions) with an average power of 3.40 kW. A receiving antenna 60.0 cm long is at a location 4.00 mi from the transmitter. Compute the amplitude of the emf that is induced by this signal between the ends of the receiving antenna. mV Need Help? Read It Watch It Submit Answer SERPSE10 33.5.P.023.MI. 12. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 14.0-mW helium-neon laser emits a beam of circular cross section with a diameter of 2.85 mm. (a) Find the maximum electric field in the beam. KN/C (b) What total energy is contained in a 1.00-m length of the beam? [d (c) Find the momentum carried by a 1.00-m length of the beam. kg m/s Need Help? Read It Master It