Physics Modern Physics Level: Misc Level
The K^0 particle decays according to equation K^0-> pi+ pi-.If a particular K^0 decyas while it is at rest in a laboratory, what are the kinetic energies of each of the two pions?( The rest mass of the K^0 is 497.7 MeV/c^2.)
Physics Modern Physics Level: Misc Level
Protons move in a circle of radius 6.90 cm in a 0.510- T magnetic field. what value of electric field could make their paths straight?
Physics Modern Physics Level: Misc Level
Two charged particles repel each other with a force F. If the charge of one of the particles is doubed and the distance between them is also doubed, then the force will be a. F b. 2F c.F/2 d.F/4 e. none of these
Physics Modern Physics Level: Misc Level
A proton and electron are placed in an electric field. Which undergoes the greater acceleration?a. both accelerate equally b. proton c. Electron d. Neither accelerates
Physics Modern Physics Level: Misc Level
An exited atom is an atom a. that has excess vibration b. that has one or more displaced electrons c. that is franctic d. with more protons than electrons
Physics Modern Physics Level: Misc Level
a proton is moving in a circular path of radius 1 m with a uniform speed of 1.0x^6 m/s the acceleration of the proton has a magnitude of?
Physics Modern Physics Level: Misc Level
A straight stream of protons a given point in space at a rate of 1.2 E9 proton /s. What magnetic field do they produce 1.3 m from the beam?
Physics Modern Physics Level: Misc Level
What is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and magnetic fields of magnitude 8.0E3 V/m and 0.0048T, respectively?
What is the radius of the electron orbit if the electric field is turned off?
Enter your answer with 2 significant digits.
Physics Modern Physics Level: Misc Level
A 3.6- MeV (kineticenergy) proton enters a 0.100- T field, in a plane perpendicular to the field.What is the radius of its path?
Physics Modern Physics Level: Misc Level
Determine the magnitude and direction of the force on an electron traveling 8.85 E5 m/s horizontally to the east in a vertically upward magnetic field of strength 0.55 T. Magnitude: Direction:
Physics Modern Physics Level: Misc Level
Two electrons are fixed 2.5 cm apart.Another electron is shot from infinity and stops midway between the two. What was its initial speed in meter per second?
Physics Modern Physics Level: Misc Level
An alpha particle , starting from rest, acquired a speed of 1.38 x 104 m/s while moving through an electric potential difference.
a. The magnitude of the electrical potential was ---
b. the final energy of the alpha particle, in electron volts, was ---eV.
Physics Modern Physics Level: Misc Level
The activity of a certain large sample of radioactive nucleus x (decay constant =0.0002770/yr) is measured to be 11,080/yr. If the original sample size was 8x10 raised to the 9 th power nuclei, then approximately how many years elapse to yield the stated activity. ( carry 3 significant digits)?.
Physics Modern Physics Level: Misc Level
A radioactive nucleus (# 1) has approximate mass 125 and 52 protons. (#1) undergoes beta decay to daughter nucleus (#2) . (#2), still radioactive, then undergo gamma decay. The number of protons in the nucleus that remaims after (#2) undergoes this decay is what?
Physics Modern Physics Level: Misc Level
A decay particle is emitted ( by a nucleus) due east into a uniform magnetic field that is directed vertically down. The particle is immediately or instantaneously deflected north. The particle is a:(A) alpha (B) beta (C) gamma (D) neutron (E) proton (F) either alpha or proton. Give a conceptual explanation of your answer.
