A 35-mm single lens reflex (SLR) digital camera is using a lens of focal length 35.0 mm to photograph a person who is 1.80 m tall and located 3.60 m from the lens
(a) How far is the CCD sensor from the lens when the person is in focus? (b) How tall is the person's image on the CCD sensor?
(a) 3.53 cm (b) 1.77 cm
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A 2.00 kg pendulum bob on a string 1.50 m long, is released with a velocity of 3.00 m/s when the support string makes an angle of 45.0 degrees with the vertical. What is the tension in the string at the bottom of the swing?
A. 53.5 N B. 49.8 N C. 43.1 N D. 37.5 N E. 30.2 N
The number 0.003010 has
A) 7 significant figures. B) 6 significant figures. C) 4 significant figures. D) 2 significant figures.
A point charge q = +1 ?C is located at the origin. What is the flux of the electric field of this charge through a square whose corners are (x, y, z) = (1, 1, 1), (-1, 1, 1), (-1, 1, -1), and (1, 1, -1)?
A) 11.3 × 104 Nm2/C B) 0.5 × 104 Nm2/C C) 0 D) 1.0 × 104 Nm2/C E) 1.9 × 104 Nm2/C
The graph below shows the velocity versus time graph for a ball. Which explanation best fits the motion of the ball as shown by the graph?
a.
The ball is falling, is caught, and is thrown down with greater velocity.
b.
The ball is rolling, stops, and then continues rolling.
c.
The ball is rising, hits the ceiling, and falls down.
d.
The ball is falling, hits the floor, and bounces up.
e.
The ball is rising, is caught, and then is thrown down.