Athin rope with a linear density of 2.22 g/m is attached to a thick rope with a linear density 15.19 g/m. they support a 8.11 kg mass which is suspended from a massless pulley at the end of the thick rope. a sinusoidal pulse with amplitude 6.81 cm is sent along the thin rope.
a)what is the speed of the pulse along the thin rope?

b)half the power is transmitted and half is reflected at the boundary of the thin and thick ropes. what is the amplitude of the reflected pulse?

c)what is the amplitude of the transmitted pulse?

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

option number c is the right answer.

the answer is the last option

explanation:

because in order to know what the molecule is you need to know how many atoms of each element are in the molecule.