A carbon nucleus and an iron nucleus are initially located 9.22 nm apart from one another. How much work would it take to move the carbon nucleus to a new distance of 3.06 nm from the iron nucleus? 29.4 eV

If the speed of the electron in Example 19-4 were 7.3 * 105m>s,what would be the corresponding orbital radius?

In my laboratory, if I notice my vacuum system has a leak to atmosphere, I use a mass spectrometer to find the leak. I connect my vacuum system to the mass spectrometer, and spray my systems walls with helium. If the mass spectrometer reads helium when I spray a particular wall of my system, I can pinpoint where the leak is. Suppose an ionized helium atom has a mass of 6.6 x 10^-27 kg and a speed of 4.4 x 10 ^5 m/s as it moves into the mass spectrometer. It moves perpendicular to a .75 T magnetic field on a circular path that has a .012-m radius. Determine whether the charge of the ionized atom is +e or +2e.

4. MILLIKAN EXPERIMENT. An oil drop with a mass of 3.1 x10-1$kg absorbs 11 electrons, and then falls through an opening in two parallel, horizontal plates 1.8 cm apart. The upper plate is positive. a) Determine the charge absorbed by the oil drop. b) Determine the required potential difference between the plates in order for the oil drop to be suspended between the two plates.

The electronic structure of atoms and molecules may be investigated using photoelectron spectroscopy. An electron in a photoelectron spectrometer is accelerated from rest by a uniform electric field to a speed of 420 km s−1 in 10 µs. Determine the kinetic energy of the electron?     a. 8.0 x 10-20 N.m       b.  1.6 x 10-25 N.m       c. 3.8 x 10-25 N.m       d. 4..0 x 10-2 N.m

Determine the distance between the electron and proton in an atom if the potential energy UU of the electron is 11 eV (electronvolt, 1 eV =1.6×10−19=1.6×10−19 J). Give your answer in Angstrom (1 A = 10-10 m).

In an oil-drop experiment similar to Millikan’s, an oil droplet is suspended between two parallel, charged plates. Calculate the magnitude of the charge on the oil droplet if the radius of the oil drop is 4.2 x 10^-6 m, the density of the oil is 7.8 x 10^-2 g/m^3, the distance between the plates is 2.0 cm, and the potential difference between the plates is 99 V.

10. An electron has been placed at the origin. The grid spacing is 1 Angstrom per small square this time. Now you have a nucleus with 18 protons at x = 2.1 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 14 protons from 1 m away and place it at y = 8.0 Angstroms on the y-axis?     165.2 eV     413.1 eV     -25.2 eV     438.2 eV

Can you help with this please?

In a Millikan experiment, two horizontal parallel plates are 3.5 cm apart. A sphere A whose mass is equal to 4.2 x 10^-17 kg remains in suspension, while the potential difference between the plates is 5.00 V and the upper plate is positive.a. Determine the charge on the sphere.b. What is the magnitude of the sphere's excess or deficiency of electrons?