Place a coin on top of a sheet of paper on a desk or table. Pull the paper horizontally with a quick snap. What concept
of physics does this illustrate?

are you like autistic or something?

xd

c)as speed changes, wavelength and frequency change.

everything changes!

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

that would be because of both gravity and friction. so     c