5108

Physics Modern Physics Level: Misc Level

waves and photons (A) can (B) cannot (C) Sometimes, can be used to describe EXACTLY the same EXPERIMENTAL observations. Explain your choice, if possible, give an example.




4966

Physics Modern Physics Level: Misc Level

Calculate the energy in keV of an x -ray photon that has a frequency of 1.69 x 10Hz.




4814

Physics Modern Physics Level: Misc Level

An electron in an old -fashioned T V camera tube is moving at 10.0 x106 m /s in a magnetic field of strength 110 m T. What is the (a) maximum and (b) minimum magnitude of the force acting on the electron due to the field? (c) At one point the electron has an acceleration of magnitude 5.80 x 10 14 m /s 2.What is the angle between the electron s velocity and the magnetic field?




4813

Physics Modern Physics Level: Misc Level

An electron that has a velocity with x component 2.3 x 10 6 m /s and y component 3.8 x 10 6 m /s moves through a uniform magnetic field with x component 0. 030 T and y component -0.17 T. (a) Find the magnitude of the force on the electron. (b) Repeat your calculation for a proton having the same velocity.




4812

Physics Modern Physics Level: Misc Level

An electron is accelerated from rest by a potential difference of 399 V. It then enters a uniform magnetic field of magnitude 160 m T with its velocity perpendicular to the field. Calculate ( a) the speed of the electron and (b) the radius of its path in the magnetic field.




4811

Physics Modern Physics Level: Misc Level

What uniform magnetic field, applied perpendicular to a beam of electrons moving at 7.31 x 10 6 m /s, is required to make the electrons travel in a circular arc of radius 0.349 m ?




4575

Physics Modern Physics Level: Misc Level

Nearly all the mass of an atom is concentrated in its nucleus. Where is its charge located?




4517

Physics Modern Physics Level: Misc Level

Imagine a photon strikes a metal plate that has a work function of Theta =3 x 10 to the - 19 power J. If the photon has an energy of 3.4 x 10 to the negative 18 power J, what is the maximum kinetic energy of the ejected electrons?




4512

Physics Modern Physics Level: Misc Level

A neutral Al ( aluminum ) atom has 13 electrons. What is the total charge of an aluminum atom that has 15 electrons?




4510

Physics Modern Physics Level: Misc Level

if ther is an electric field pointing toward the east, in what direction does the electric force on an an electron point? If there is a magnetic field pointing toward the east and a proton is initially moving north, in what direction will the magnetic force on that proton point?




4484

Physics Modern Physics Level: Misc Level

How much energy is deposited in the body of a 65 kg adult exposed to a 2.0 Gy dose?




4482

Physics Modern Physics Level: Misc Level

How many fissions take place per second in a 200 MW reactor? Assume 200 MeV is released per fission.




4480

Physics Modern Physics Level: Misc Level

What fraction of a sample is left after exactly 5 half - lives?




4479

Physics Modern Physics Level: Misc Level

What is the maximum kinetic energy of an electron emitted in the B-1 emission?




4478

Physics Modern Physics Level: Misc Level

What is the approximate radius of an alpha particle ( 4 2 He)?


Displaying 46-60 of 149 results.