Recent content by hopelessphysics

How will that help me?

so how does it affect the 20×25?

I don't understand how the two go together?

thats what I am confused about

the original equation: How many complete oscillations has the wave made at t= 20.0 s and x=4.2 m?

So 500 would be the answer?

I'm sorry but I am not following what you are saying...could you re-explain it?

Homework Statement A wave is described by y=12sin(4t-8x). What is its propagation speed? A. 0.2 B. 0.5 C. 4 D. 8 E. 12 Homework Equations v=wavelength/period v=wavelength×frequency The Attempt at a Solution period= 2π/w=2π/8=.7853 But confused on how to find the wavelength?

that would be the frequency times the time period? so 25×20?

what do you mean? what is the phase of the wave?

What is the second equation?

Homework Statement As you drive at a speed of 15.0 m/s an ambulance approaches you from behind with its siren blaring at a frequency of 1022 Hz. After the ambulance has passed you the signal is now 981 Hz. If both you and the ambulance travel at a constant speed how fast was the ambulance...

Homework Statement A wave has a wavelength of 3.0m; a frequency of 25.0 Hz; and amplitude of 14.0 cm. The wave travels in the positive x-direction and has a value of zero at t=x=0. How many complete oscillations has the wave made at t= 20.0 s and x=4.2 m? A) 3132 B) 1566 C) 498 D) 25 E) 3...

isn't the original equation fo=fs(1+- vo/v)/(1+-vs/v)

how do you apply it relative to the air?