If the temperature is 68°F
and the air contains 1% water vapor, what is the relative humidity?
1%
1.7%
17%
58.8%
Suppose the temperature is
15°C and the relative humidity is 50%. What is the absolute humidity?
0.2%
0.65%
1.3%
2.6%
Suppose
the temperature is 80° F with 1 % absolute humidity . A cold front
moves in, causing the temperature to drop. Precipitation will begin to
fall when the temperature drops below what level?
10°F
32°F
50°F
75°F
The average power available
from sunlight on Earth (day and night) is 300 Watts per m^{2}
Earth's surface area = 5.1 x 108 km^{2} (square
kilometers)
Suppose solar energy is used on this planet. Assume the facts listed
above.
Today,
the best photovoltaic solar panels are able to convert 20% of the
available energy to electricity. If a glowglobe uses as much
electricity as a 25 Watt light bulb, how large an area of solar panels
would be needed to light one glowglobe for each of the 1000 persons
living in the sietch?
42
square meters
84
square meters
417
square meters
16.8
square meters
Solar power available on
Earth: (0.3 kilowatts per square meter) = 300 Joules/second m^{2}
Suppose
a "plantoid" alien being requires the same amont of energy per day as a
human but uses photosynthesis (with 20% solar efficiency) instead of
eating food. Assume a human being eats food containing 2000 food
Calories per day (1 food Calorie = 4.18 kilo-Joules). What surface area
(in square meters, m^{2}) would the plantoid need
to sustain itself?
0.322
square meters
1.61
square meters
19.32
square meters
38.64
square meters
A
"cameloid" alien can lose 30% of its weight in water after 17 days in
the desert without drinking; then, when it finds water, it can drink
enough in ten minutes to replace it all. Suppose after 17 days in the
desert a fully dehydrated cameloid weighing 500 kg finds water; how
much would it have to drink?
150
kg
167
kg
214
kg
500
kg
Today
in the United States, the per capita power consumption is 10,500 Watts.
In Bangladesh, it is 265 Watts. For the Bangladeshi per capita power to
grow exponentially to reach that of the United states by 2100 (assuming
that of the U.S. remains constant) what doubling time would be needed?
9.26
years
17.3
years
38.6
years
39.6
years
In
the year 1960, the CO2 level in Earth's atmosphere was 317 parts per
million (ppm). In 2000, the CO2 level was 370 ppm. If CO2 increases
exponentially, what is the doubling time?
61
years
179
years
348
years
517
years
If the earth has 3.57x10^8
square meters of ocean, which is 70% of the earth's surface, what is
the earth's surface area?
2.50
square meters
4.64x10^8
square meters
5.1x10^8
square meters
6.07x10^8
square meters
If
the human body uses 0.5 liters of water per day for bile production,
how long would it take for the body to release 3.5 liters of water
through bile?