Cart A with a mass of 8 kilograms rolls to the right at 15 meters per second. Cart B with a mass of 9 kilograms rolls to the left at 11 meters per second. After they collide, Cart B is rolling to the right at 2 meters per second. (Neglect friction) Calculate the magnitude of block A’s velocity after the collision. Claim:
Evidence:
Reasoning:

c)as speed changes, wavelength and frequency change.

everything changes!

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

the answer is 12 as i may remember

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305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures