Suppose we compare the combined mass of a C atom and an O2 ...

[Ebrown]

Suppose we compare the combined mass of a C atom and an O2 molecule, both at rest, with the mass of a CO2 molecule, also at rest. According to Einstein's theory, the combined mass of the C and O2 is
 
  A) slightly less, by an amount so small that it hard to measure, than the CO2 molecule's mass.
  B) precisely equal to the CO2 molecule's mass.
  C) considerably more than the CO2 molecule's mass.
  D) considerably less than CO2 molecule's mass.
  E) slightly more, by an amount so small that it hard to measure, than the CO2 molecule's mass.

Question 2

An Atwood machine consists of an object of mass of 3.5 kg connected by a light string to an object of mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 kg  m2 and a radius of 12.5 cm.
 
  If the system is released from rest, what is the speed of the objects after they have moved through 1.25 m if the string does not slip on the pulley? A) 2.0 m/s
  B) 2.3 m/s
  C) 4.0 m/s
  D) 5.0 m/s
  E) 6.0 m/s

[Andromeda18]

Answer to Question 1

E

Answer to Question 2

B

[Ebrown]

Thank you!

[Andromeda18]

Always glad to help...