Ariel claims that a pulse is described by the equation     where x and y are measured in cm and t in s. Miranda says that it is not possible to represent a pulse with this function because a wave must be a function of x + vt or x?vt. Which one, if either, is correct, and why?

A.

Ariel, because x2- 6.0xt + 9t2 = (x- 3.0t)2.

B.
Ariel, because a pulse is not an infinite wave.

C.
Miranda, because (x- 3.0t)2 is the same as (3.0t- x)2.

D.
Miranda, because a pulse is not an infinite wave.

E.
Miranda, because is infinite when x = 0.


Answer: A

Physics & Space Science

You might also like to view...

RMS and Peak Quantities: A 0.150-kW lamp is plugged into a 120-V ac wall outlet. What are (a) the peak current through the lamp, (b) the rms current through the lamp, and (c) the resistance of the lamp?

What will be an ideal response?

Physics & Space Science

A hydrogen atom makes a downward transition from the state to the n = 5 state. Find the wavelength of the emitted photon

The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 2.43 ?m B) 1.46 ?m C) 1.94 ?m D) 2.92 ?m

Physics & Space Science

Sara lies on a bed of sharp nails without harm because

A) many of the nails don't make contact with her body. B) her weight is distributed over hundreds of nails. C) she exercises mind over matter. D) none of the above

Physics & Space Science

The momentum of an object never changes

Indicate whether the statement is true or false

Physics & Space Science