Question

29. What does a ‘0’ mean in binary code?
A.A switch is set so that an electrical charge can flow.
B.There is data at this digit’s location.
C.A switch is set so that an electrical charge cannot flow.
D.There is no data at this digit’s location.

30. The US Army computer ENIAC, created in 1945, was
A.over 20 tons and made with vacuum tubes.
B.small enough to fit easily on a desk.
C.the first computer to use microprocessors.
D. none of these

31. Which of these is not a name for a bone in the eardrum?
A.the stirrup
B.the drumhead
C.the hammer
D.the anvil


32. Why do sounds coming from an object moving away from you sound lower in pitch?
A.Because the object is moving away, the sound waves are closer together.
B.Because the object is moving away, the sound waves are farther apart.
C.Because the object is moving away, the sound waves have a greater amplitude.
D.Because the object is moving away, the sound waves have a lesser amplitude.

33. Through which substance will sound travel most quickly?
A.salt water
B.ice
C.fresh water
D.air
34. Using sound to find objects is called what?
A.echolocation
B.sound finding
C.ultrasonic typing
D.wave location

35. What is the speed of light in a vacuum?
A.300,000,000 meters per second
B.200,000 miles per hour
C.300,000 kilometers per hour
D.250,000 miles per second

Answer 1

@prettyboy20202

Answer 2

@Anonymousstudent

Answer 3

@lovatic4life

Answer 4

u there?

Answer 5

@Euler271