Assuming a pupil diameter of 3 mm, what is the angular resolution of the human eye for light at the middle of the visible spectrum (550 nm)?
A) 0.8°
B) 0.2°
C) 2 mrad
D) 0.01°
E) 2°
D
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A 5.00-m-long uniform ladder, weighing 200 N, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.20 m away from the wall. The coefficient of static friction between the ladder and the floor is 0.200
How far up the ladder, measured along the ladder, can a 600-N person climb before the ladder begins to slip? A) 1.50 m B) 1.26 m C) 1.05 m D) 3.95 m E) 4.56 m
A hill is 150 m long and makes an angle of 12° with the horizontal. As a 60-kg jogger runs up the hill, how much work does gravity do on the jogger?
a. 8.82E+4 J b. 1.83E+4 J c. ?1.83E+4 J d. 8.63E+4 J e. zero
Which of the following molecules is a branched hydrocarbon?
A) a B) b C) c D) All of the above are branched hydrocarbons. E) only a and b
Suppose you released a single proton from rest at some point X in an electric field, and that you then released a single electron from rest at the same point X
How would the motions of the proton and electron compare, just after their release from rest? A) They would move in opposite directions, and the proton would move fastest. B) They would move in the same directions, and the electron would move fastest. C) They would move in the same directions, and the proton would move fastest. D) They would move in opposite directions, and the electron would move fastest. E) They would move in opposite directions, and at the same speeds.