Physics- Sound and Electrostatics and Magnetism

Question 1

speed of sound

Answer 1

V=sqrt B/P

Question 2

intensity of sound

Answer 2

I=PA

Question 3

sound level eqn

Answer 3

dB=10log10(I/Io)

Question 4

doppler effect

Answer 4

f’= [(V+/-Vo)/(V+/-Vs)]*fo

Question 5

if the source is stationary how do you change the doppler eqn

Answer 5

Vs=0

Question 6

if the detector ( observer) is stationary how do you change the doppler equation

Answer 6

Vo=0

Question 7

If distance between the source and observer ( detector) is increasing which signs do you use for the doppler equation

Answer 7

-/+

Question 8

If distance between the source and observer ( detector) is decreasing which signs do you use for the doppler equation

Answer 8

+/-

Question 9

coloumb’s law

Answer 9

Fe=k*(q1q2/r^2)

Question 10

electric field energy eqn

Answer 10

E=Fe/q=k*Q/r^2

Question 11

Dipole moment eqn

Answer 11

P=qd

Question 12

speed of light eqn

Answer 12

c=wavelength*frequency

Question 13

photon effect , eqn

Answer 13

E=hf

Question 14

what direction are equipotential lines in relation to their field lines?

Answer 14

perpindicular

Question 15

place in order the following of the electromagnetic spectrum by wavelength ( longest

Answer 15

Radio > microwaves > IR > visible light> UV> x-rays > gamma rays

Question 16

how does frequency relate to wavelength and energy

Answer 16

low frequency for long wavelengths, and low energy

high frequency for short wavelengths, and high energy

Question 17

place in order of increasing wavelength the colors of the visible light spectrum

Answer 17

VIBGYOR
red = highest
violet = lowest