Question 1
Question 2
1. Which of these relate most to the loudness of sound?
Select one:
a. wavelength.
b. frequency.
c. speed.
d. amplitude.
e. all of the above
2.
The principle of continuity states that for fluid flow to be continuous it must
Select one:
a. speed up in narrow regions of flow.
b. slow down in wide regions of flow.
c. both of these
d. neither of these
3.
Both a transverse wave and a longitudinal wave have
Select one:
a. amplitude.
b. frequency.
c. wavelength.
d. speed.
e. all of the above
4.
The high voltage that is important in a power line is high voltage
Select one:
a. between the parallel wires of the line.
b. from one end of each power line to the other.
c. both of these
d. neither of these
5.
In the Doppler effect it is important to distinguish between
Select one:
a. frequency and speed.
b. speed and velocity.
c. speed and acceleration.
d. distance and displacement.
6.
Due to the presence of ice crystals in nearly frozen liquid water, the density of water is
Select one:
a. lower.
b. unaffected.
c. higher.
7.
The sky is blue because air molecules in the sky act as tiny
Select one:
a. mirrors which reflect only blue light.
b. optical tuning forks that scatter blue light.
c. sources of white light.
d. prisms.
e. none of the above
Question 3
Question 4
Answer to question 1
Answer to question 2
1) Amplitude
explaination : Loudness measn intensity and it is proportional to square of Amplitude .
so amplitude is the correct answer.
Answer to question 3
Answer to question 4
