The Law of Universal Gravitation was developed by
A) Kepler.
B) Galileo.
C) Newton.
D) Copernicus.
E) Einstein.
C
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An object attached to one end of a string moves in a circle at constant speed. Which of the following is correct?
A. the object is accelerating as it moves B. the object's velocity is the same as its speed C. the object does not require a force to keep its state of circular motion D. if the string breaks, the object will keep its circular motion E. If the string breaks, the object will move Radially away from the center of the cicl
A 25-?F capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-?F capacitor is 36 V. What is the value of the capacitance of C?
a. 43 ?F b. 29 ?F c. 22 ?F d. 58 ?F e. 63 ?F
0.00325 × 10-8 cm can also be expressed in mm as
A) 3.25 × 10-12 mm. B) 3.25 × 10-11 mm. C) 3.25 × 10-10 mm. D) 3.25 × 10-9 mm. E) 3.25 × 10-8 mm.
A 5.0-m long, 12-kg, ladder rests against a smooth vertical wall with the bottom of the ladder 3.0 m from the wall. The coefficient of static friction between the floor and the ladder is 0.28
What distance, measured along the ladder from the bottom, can a 60-kg person climb before the ladder starts to slip? A) 4.0 m B) 3.7 m C) 1.7 m D) 1.3 m E) 3.3 m