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Author Question: Two steel spheres are made of the same material and have the same diameter, but one is solid and the ... (Read 117 times)

xroflmao

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Two steel spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount
 
  A) the two spheres remain of equal size.
  B) the solid sphere becomes lighter and the hollow one becomes heavier.
  C) the solid sphere becomes bigger than the hollow one.
  D) the solid sphere becomes heavier and the hollow one becomes lighter.
  E) the hollow sphere becomes bigger than the solid one.

Question 2

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the n = 7 state to the n = 2 state? (c = 3.00  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
 
  A) 199 nm
  B) 365 nm
  C) 4480 nm
  D) 398 nm
  E) 796 nm


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olderstudent

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