what are two objects with the same volume. why does one feel heavier?

Answer 1

I don't know what objects have the same volume. But just because their volume is the same that does not mean the mass is.
For example : Density = Mass/Volume
Lets say there are objects both with volume of 10
Volume = Mass / Density

First object is 1000 in mass and 100 in density.

Second one is 500 in mass and 50 in density

Doing the math 1000/100 = 500/50 = 10.
Both the same volume, yet the first object's mass is double the second's.

Answer 2

A train travels at the rate of 120 km per hour. what is its speed in meters per minute?