A wind of velocity 10 m/s is blowing through a wind generator with blade radius 5.00 meters. What is the maximum power output if 30.0% of the wind's energy can be extracted? rair = 1.25 kg/m3
a. 7.20 kW
b. 14.7 kW
c. 21.3 kW
d. 29.4 kW
e. 39.6 kW
B
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Determine the magnitude and sense (direction) of the current in the 10-? resistor when I = 1.8 A
a.
1.6 A right to left
b.
1.6 A left to right
c.
1.2 A right to left
d.
1.2 A left to right
e.
1.8 A left to right
In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits. A screen is placed 2.0 m from the slits
At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other? A) 4.5 mm B) 3.0 mm C) 6.0 mm D) 1.5 mm
What is the temperature of a system in thermal equilibrium with another system made up of ice and water at one atmosphere of pressure?
a. 0°F c. 0 K b. 273 K d. 100°C
Vectors A , B, C and have magnitudes 6, 11, and 22. When these vectors are added, what is the least possible magnitude of their addition?
A. 25 B. 15 C. 5 D. 3