What is the occupancy probability at an energy 1.0% above a Fermi level of 7.0 eV at 300 K?
A)
0.06%
B)
1.0%
C)
3.2%
D)
6.3%
E)
12%
D
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Conversion of Units: The following conversion equivalents are given:1.00 gal = 231 in3 1.0 ft = 12 in 1.0 min = 60 s If a pipe delivers water at the rate of 95 gal/min, its rate of flow in ft3/s is closest to
A. 0.21 ft3/s. B. 0.19 ft3/s. C. 0.17 ft3/s. D. 0.15 ft3/s. E. 0.14 ft3/s.
Glycerin, with a viscosity of 1.50 N • s/m2, is flowing with an average speed of 1.20 m/s through a tube that has a radius of 5.00 mm and is 25.0 cm long. What is the drop in pressure between the ends of the tube?
A) 144 kPa B) 45.8 kPa C) 72.0 kPa D) 76.3 kPa E) 129 kPa
A swimming pool heater has to be able to raise the temperature of the 50 000 gallons of water in the pool by 12.0 C°. How many kilowatt-hours of energy are required? (One gallon of water has a mass of approximately 3.8 kg and the specific heat of water is 4,186 J/kg/°C.)
a. 6.98E+2 kWh b. 2.65E+3 kWh c. 2.21E+2 kWh d. 2.65E+4 kWh e. 2.65E+2 kWh
A 4.0-W resistor has a current of 3.0 A in it for 5.0 min. How many electrons pass through the resistor during this time interval?
a. 7.5 × 10^21 b. 5.6 × 10^21 c. 6.6 × 10^21 d. 8.4 × 10^21 e. 2.1 × 10^21