TV uses satellites that hover above one point over our planet as the rest rotates. The satellites give out 10 GHz EM waves that a dish (with a diameter of 40cm) on a house's roof absorbs. The dishes are like circular apertures to collect signals. These dishes have to distinguish signals from two adjacent satellites to get good signal. Draw and label a diagram, show all work, and explain throughly using physics equations: What is the maximum amount of satellites that can be used for TV ? Earth radius = 6.38 x 106 m Earth mass = 6 x 1024 kg

Two radio antennas separated by d = 302 m, as shown in the figure below, simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1,040 m from the center point between the antennas, and its radio receives the signals. Hint: Do not use the small-angle approximation in this problem. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 400 m northward, what is the wavelength of the signals? m (b) How much farther must the car travel from this position to encounter the next minimum in reception?

What is the energy of light having a frequency of (4.79x10^14)? Answer to 3 significant figures in scientific notation. Unit is case sensitive. 4 Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Answer x10 units