Photographers control the "blurring" in a picture by varying the shutter speed, i.e., the amount of time the film is exposed. A very sharp picture with little blurring implies which of the following:
a. the shutter speed is very fast.
b. the objects in the photograph are not moving.
c. both a. and b. are possible interpretations.
d. the camera is shaking.
e. the camera is out of focus.
c
You might also like to view...
Approximately how many other planetary systems have been discovered to date?
A) tens B) hundreds C) thousands D) tens of thousands E) millions
In order to be able to directly see the Sun's motion due to Jupiter's gravity, an observer at a distance of 30 light-years would need to be able to measure changes in its position of ________
A) 0.0005 arcsecond B) 0.05 arcsecond C) 0.005 arcsecond D) 0.5 arcsecond
An object of mass 4 kg starts at rest from the top of a rough inclined plane of height 10 m as shown in Fig. 8-9
If the speed of the object at the bottom of the inclined plane is 10 m/s, how much work is done by the force of friction? Use g = 10 m/s2. A) -100 J B) 100 J C) 0 D) -200 J E) 200 J
A sports car and a moving van move at the same speed when they crash into a cement wall and stop equally quickly. The vehicle to have the greater force of impact will be
1) the sports car, 2) the van, 3) neither, for they experience equal forces of impact because 4) they are traveling at the same speed. 5) the van's momentum is much greater. 6) the sport car has a greater change in velocity upon impact. 7) they both have equal momentum.