5876

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.)




5866

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?




5861

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




5854

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




5847

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




5795

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?




5552

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?




5548

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.




5547

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?




5546

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:




5363

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?




5312

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.




5114

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)?.




5113

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?




5111

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.


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