The equivalent capacitance of the circuit shown below is
a.
0.2 C.
b.
0.4 C.
c.
1 C.
d.
4 C.
e.
5 C.
b
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An electric motor draws a current of 2.60 A from a 18.0-V battery when it runs at normal speed. If the motor's armature is "jammed" so that it cannot rotate, the current suddenly rises to 10.0 A. What is the back emf of the motor when running at normal speed?
a. 4.68 V b. 10.0 V c. 22.7 V d. 13.3 V e. 133 V
Molecular oxygen, O2, and ozone, O3, are both examples of
A) atoms. B) elements. C) compounds. D) mixtures.
A car goes around a curve at 40 m/s. An accelerometer in the car measures the centripetal acceleration of a 2-kg body in the car to be 8 m/s2 . The radius of the curve is __________
Fill in the blank(s) with correct word
The half angle of the conical shock wave produced by a supersonic aircraft is 60°. What is the Mach number of the aircraft?
A) 2.0 B) 0.87 C) 1.73 D) 1.15 E)