Organic molecules are
A) carbon-based.
B) silicon-based.
C) living cells.
D) found only on Earth.
E) not found outside our solar system.
A
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A ceiling fan is turned on and reaches an angular speed of 60 rev/min in 20 s. It is then turned off and coasts to a stop in 40 s. In the one minute of rotation, through how many revolutions did the fan turn?
a. 30 c. 0 b. 60 d. 600
Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them
(k = 1/4??0 = 8.99 × 109 N ? m2/C2) (a) What is the capacitance of this combination? (b) What is the charge carried by each sphere?
The force that holds electrons within atoms is the
A. magnetic force between the electrons. B. gravitational force with the nucleus. C. nuclear force with the nucleus. D. electrical force with the nucleus.
Three solid, uniform, cylindrical flywheels, each of mass 65.0 kg and radius 1.47 m rotate independently around a common axis
Two of the flywheels rotate in one direction at the other rotates in the opposite direction at 3.42 rad/s. Calculate the magnitude of the net angular momentum of the system. A) 298 kg ? m2/s B) 778 kg ? m2/s C) 257 kg ? m2/s D) 222 kg ? m2/s