The kinetoscope is
a. a disk with a series of drawings around the edge, showing the same object in slightly different poses.
b. a standard communications protocol used to connect computer networks around the world.
c. a device that creates the illusion of movement and was the forerunner to the modern projector.
d. a portable device for recording audio and video.

The kinetoscope is a device that creates the illusion of movement and was the forerunner to the modern projector. Correct C

This motion-picture film projector was invented by Thomas A. Edison and William Dickson of the United States in 1891. It was composed of lens and an electric light bulb, through which a strip of film was passed.

hey there! :

mass = 5.75 g

volume = 7.5 cm³

therefore:

density = mass / volume

d = 5.75 / 7.5

d = 0.7 g/cm³

answer c

hope that !