Physical Properties

Question 1

Force

Answer 1

F=ma, force causes waves to move

Question 2

pressure

Answer 2

p=F/SA, waves cause a pressure change in the medium

Question 3

power

Answer 3

P=E/t, waves use power

Question 4

intensity

Answer 4

I=P/A, for traveling waves, SIL=SPL

Question 5

Compute natural frequency of a simple vibrator using period of motion

Answer 5

F=1/T

Question 6

When given the natural frequency of a simple vibrator, calculate the driving frequency that will cause the vibrator to achieve greatest amplitude

Answer 6

driving frequency is the natural frequency

Question 7

how many antinodes are in each mode?

Answer 7

antinodes= mode #

Question 8

how many nodes are in each mode?

Answer 8

nodes= one more than mode #

Question 9

sound waves

Answer 9

longitudinal

Question 10

light waves

Answer 10

transverse

Question 11

water waves

Answer 11

both

Question 12

wavelength of a longitudinal wave is

Answer 12

distance between 2 condensations or rarefactions

Question 13

when tension goes up, wave speed goes

Answer 13

up

Question 14

when destiny goes up, wave speed goes

Answer 14

down

Question 15

wavelength=

Answer 15

wave speed/freq

Question 16

wave speed in a string =

Answer 16

square root(tension/linear density)

Question 17

diffraction

Answer 17

bending of waves around obstacles or through openings. sound spreads out more at lower freq

Question 18

reflection

Answer 18

abrupt change in direction of travel caused be change in medium

Question 19

refraction

Answer 19

bending of waves when they pass from one medium to another. Bent toward direction of lower wavespeed

Question 20

doppler shift

Answer 20

change in apparent freq due to relative motion. fpercieved=fo(I)(changef)

Question 21

Calculate distance to an object when given time delay between initial sound and echo

Answer 21

v=2d/t, v=speed of sound din medium, d= distance from source to wall

Question 22

how does temperature affect sound speed?

Answer 22

faster in hot air