Question1a subway train starting from rest leaves a station, Ask an Expert

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Question1

A subway train starting from rest leaves a station with a constant acceleration. At the end of 9.34 s, it is moving at 15.0374 m/s. What is train's displacement in ?rst 5.99628 s of motion?

Question2

The mass of a copper atom is 1.56 10-25 kg, and density of copper is 8 920 kg/m3.

(a) establish the number of atoms in 1 cm3 of copper

(b) imagine the one cubic centimeter as created by stacking up identical cubes, with one copper atom at the center of each. Establish volume of each cube.

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