2. The figure below shows two isotropic point sources of sound, S1 and S2. The sources emit waves
in phase at wavelength 0.50 m. They are separated by D = 1.75 m. If we move a sound detector
along a large circle centered at the midpoint between the sources, at how many point do waves
arrive at the detector (a) exactly in phase and (b) exactly out of phase?

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

i think it would be 5