How much current will be flowing through a 40.0 m length of cylindrical metal wire with radius 0.0 mm if it is connected to a source supplying 16.0 V? The resistivity of this metal is 1.68 × 10-8 ? ? m
A) 1200 A
B) 9.5 × 108 A
C) 68 nA
D) 710 A
A
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Addition by 1. Components: Vector 
= 4.00 m points eastward and vector 
= 3.00 m points southward. The resultant vector 
+ 
is given by
A. 5.00 m at an angle of 36.9° south of east. B. 5.00 m at an angle of 53.1° south of east. C. 5.00 m at an angle of 71.6° south of east. D. 5.00 m at an angle of 18.4° south of east. E. 5.00 m at an angle of 26.6° south of east.
Approximately how long after the Solar System formed did it take for oxygen to get to within 80 percent of its present abundance in Earth's atmosphere?
a. 4 billion years b. 1 billion years c. 400 million years d. 1 million years e. Oxygen was always a primary component of Earth's atmosphere.
Jill does twice as much work as Jack does and in half the time. Jill's power output is
A) the same as Jack's power output. B) one-fourth as much as Jack's power output. C) one-half as much as Jack's power output. D) twice Jack's power output. E) four times Jack's power output.
A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 1.5 m. The maximum angle the string makes with the vertical as the pendulum swings is 30°. What is the speed of the object at the lowest point in its trajectory?
a. 2.0 m/s b. 2.2 m/s c. 2.5 m/s d. 2.7 m/s e. 3.1 m/s