The oldest hominid so far discovered dates back to
A) 540 million years ago
B) 65 million years ago
C) a few thousand years ago
D) 6 to 7 million years ago
D
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A car drives over a hilltop that has a radius of curvature 0.120 km at the top of the hill. At what speed would the car be traveling when it tires just barely lose contact with the road when the car is at the top of the hill?
A) 45.5 m/s B) 41.8 m/s C) 34.3 m/s D) 22.2 m/s E) 27.6 m/s
An ideal step-down transformer has 200 primary turns and 50 secondary turns. If 440 volts (rms) is placed across the primary, what is the current in the secondary when the load resistance is 7.00 ohms?
a. 3.6 A (rms) b. 7.3 A (rms) c. 11.4 A (rms) d. 15.7 A (rms) e. 12.4 A (rms)
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Answer the following statement true (T) or false (F)
Between A and D?
A. 0 s B. 2 s C. 3 s D. 4 s E. 5 s F. Other (specify)