Questions from Modern Physics

Q: The radii of atomic nuclei are of the order of 5.

The radii of atomic nuclei are of the order of 5.0 * 10-15 m. a. Estimate the minimum uncertainty in the momentum of a proton if it is confined within a nucleus. b. Take this uncertainty in momentum...

Q: You can’t see clearly underwater with the naked eye, but you

You can’t see clearly underwater with the naked eye, but you can if you wear a face mask or goggles (with air between your eyes and the mask or goggles). Why is there a difference? Could you instead w...

Q: The radii of atomic nuclei are of the order of 5.

The radii of atomic nuclei are of the order of 5.0 * 10-15 m. a. Estimate the minimum uncertainty in the momentum of an electron if it is confined within a nucleus. b. Take this uncertainty in momen...

Q: If your wavelength were 1.0 m, you would undergo

If your wavelength were 1.0 m, you would undergo considerable diffraction in moving through a doorway. a. What must your speed be for you to have this wavelength? (Assume that your mass is 60.0 kg.)...

Q: A certain atom has an energy level 2.58 eV above

A certain atom has an energy level 2.58 eV above the ground level. Once excited to this level, the atom remains in this level for 1.64 * 10-7 s (on average) before emitting a photon and returning to t...

Q: For x rays with wavelength 0.0300 nm, the m

For x rays with wavelength 0.0300 nm, the m = 1 intensity maximum for a crystal occurs when the angle θ in Fig. 39.2 is 35.8°. At what angle u does the m = 1 maximum occur when...

Q: A certain atom has an energy state 3.50 eV above

A certain atom has an energy state 3.50 eV above the ground state. When excited to this state, the atom remains for 2.0 µs, on average, before it emits a photon and returns to the ground state. a. Wh...

Q: A particle with mass m moves in a potential energy U(

A particle with mass m moves in a potential energy U(x)= A x , where A is a positive constant. In a simplified picture, quarks (the constituents of protons, neutrons, and other particles, as will be d...

Q: Imagine another universe in which the value of Planck’s constant is 0

Imagine another universe in which the value of Planck’s constant is 0.0663 J.s, but in which the physical laws and all other physical constants are the same as in our universe. In this universe, two p...

Q: For your work in a mass spectrometry lab, you are investigating

For your work in a mass spectrometry lab, you are investigating the absorption spectrum of one-electron ions. To maintain the atoms in an ionized state, you hold them at low density in an ion trap, a...