It looks like they are all units of measurement:
FOOT - POUND - NEWTON - METER
Answer: Troposphere
Explanation:
Fairly over the "surface" of Uranus lies the troposphere, where the atmosphere is the densest. The temperature ranges from a minus 243 degrees Fahrenheit (minus 153 degrees Celsius) to minus 370 F (minus 218 C) , with the upper regions being the coldest. This makes the atmosphere of Uranus the coldest within the solar system. Inside the troposphere are layers of clouds — water clouds at the least weights, with ammonium hydro sulfide clouds over them. Alkali and hydrogen sulfide clouds come following. At long last, lean methane clouds lay on the best. The troposphere amplifies 30 miles (50 kilometers) from the surface of the planet.
Using this information, we can determine that the Troposphere is the densest layer of Uranus's atmosphere.
Answer:
B. 7.6 km/s
Explanation:
Given:
Speed of the satellite orbiting Earth is, 
In order to convert the speed from miles/hour to km/s, we need to convert miles to km and hour to seconds.
The conversion factors are:
0.62 miles = 1 km
∴ 1 mile = 
1 hour = 3600 s
Now, 17000 miles/hour can be rewritten as:
Therefore, the speed in km/s is 7.6 km/s.
