Questions from Modern Physics

Q: In experiments in which atomic nuclei collide, head-on collisions

In experiments in which atomic nuclei collide, head-on collisions like that described in Problem 23.74 do happen, but “near misses” are more common. Suppose the alpha particle in that problem is not “...

Q: For a particular experiment, helium ions are to be given a

For a particular experiment, helium ions are to be given a kinetic energy of 3.0 MeV. What should the voltage at the center of the accelerator be, assuming that the ions start essentially at rest? (a...

Q: In terms of the dielectric constant K, what happens to the

In terms of the dielectric constant K, what happens to the electric flux through the Gaussian surface shown in Fig. 24.22 when the dielectric is inserted into the previously empty space between the pl...

Q: A helium ion (He++) that comes within about 10 fm

A helium ion (He++) that comes within about 10 fm of the center of the nucleus of an atom in the sample may induce a nuclear reaction instead of simply scattering. Imagine a helium ion with a kinetic...

Q: Cell membranes (the walled enclosure around a cell) are typically

Cell membranes (the walled enclosure around a cell) are typically about 7.5 nm thick. They are partially permeable to allow charged material to pass in and out, as needed. Equal but opposite charge de...

Q: A 20.0-µF capacitor is charged to a potential

A 20.0-µF capacitor is charged to a potential difference of 800 V. The terminals of the charged capacitor are then connected to those of an uncharged 10.0-µF capacitor. Compute (a). the original charg...

Q: In Fig. 24.9a, let C1 = 9.

In Fig. 24.9a, let C1 = 9.0 µF, C2 = 4.0 µF, and Vab = 64 V. Suppose the charged capacitors are disconnected from the source and from each other, and then reconnected to each...

Q: For the capacitor network shown in Fig. P24.51,

For the capacitor network shown in Fig. P24.51, the potential difference across ab is 12.0 V. Find Fig. P24.51: (a). the total energy stored in this network and (b). the energy stored in the 4.80...

Q: In Fig. E24.17, C1 = 6.00

In Fig. E24.17, C1 = 6.00 mF, C2 = 3.00 mF, C3 = 4.00 µF, and C4 = 8.00 µF. The capacitor network is connected to an applied potential difference Vab. After the charges on th...

Q: In Fig. P24.53, C1 = C5 = 8

In Fig. P24.53, C1 = C5 = 8.4 µF and C2 = C3 = C4 = 4.2 µF. The applied potential is Vab = 220 V. Fig. P24.53: (a). What is the equivalent capacitance of the network betw...