9. a ground-based radiometer operating at a wavelength of 0.45 µm is used to measure the solar radiance reaching the radiometer, io. for a solar zenith angle of 30°, it measures an io = 1.74 x 107 wm-2 µm-1 sr-1 . for a solar zenith angle of 60° it measures an io = 1.14 x 107 wm-2 µm-1 sr-1 . from this information, determine the solar radiance that’s normally incident at the top-of-atmosphere and the atmospheric optical depth.

We all use gps today, even if we don't drive yet. i bet you have been in the car with a parent and they have asked you to get out your phone to find a specific location. in your car, on the phone, you are using a very sophisticated technology. gps satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. gps receivers take this information and use trilateration to calculate the user's exact location. essentially, the gps receiver compares the time a signal was transmitted by a satellite with the time it was received. the time difference tells the gps receiver how far away the satellite is. now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map. what type of signal is utilized by the gps satellite?

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On average 8 bananas make up one pound. the price is four pounds for 5.00. you must buy 25 bananas.what is your cost?