Questions from College Physics

Q: A lens has a focal length of 28 cm and a diameter

A lens has a focal length of 28 cm and a diameter of 4.0 cm. What is the f - number of the lens?

Q: A proton in a large accelerator has a kinetic energy of 175

A proton in a large accelerator has a kinetic energy of 175 GeV. (a) Compare this kinetic energy to the rest energy of the proton, and find an approximate expression for the proton’s kinetic energy. (...

Q: What speed must a particle attain before its kinetic energy is double

What speed must a particle attain before its kinetic energy is double the value predicted by the nonrelativistic expression KE = ½ mv2?

Q: Determine the energy required to accelerate an electron from (a

Determine the energy required to accelerate an electron from (a) 0.500c to 0.900c and (b) 0.900c to 0.990c.

Q: A chain of nuclear reactions in the Sun’s core converts four protons

A chain of nuclear reactions in the Sun’s core converts four protons into a helium nucleus. (a) What is the mass difference between four protons and a helium nucleus? (b) How much energy in MeV is rel...

Q: An unstable particle with a mass equal to 3.34 x

An unstable particle with a mass equal to 3.34 x 10-27 kg is initially at rest. The particle decays into two fragments that fly off with velocities of 0.987c and -0.868c, respectively. Find the masses...

Q: Starting with the definitions of relativistic energy and momentum, show that

Starting with the definitions of relativistic energy and momentum, show that E2 = p2c2 + m2c4 (Eq. 26.13).

Q: Consider the reaction 92235U + 01n ( 57148La + 3587Br + 01n

Consider the reaction 92235U + 01n ( 57148La + 3587Br + 01n. (a) Write the conservation of relativistic energy equation symbolically in terms of the rest energy and the kinetic energy, setting the ini...

Q: Consider electrons accelerated to a total energy of 20.0 GeV

Consider electrons accelerated to a total energy of 20.0 GeV in the 3.00 - km - long Stanford Linear Accelerator. (a) What is the ( factor for the electrons? (b) How long does the accelerator appear t...

Q: An electron has a speed of 0.750c. (

An electron has a speed of 0.750c. (a) Find the speed of a proton that has the same kinetic energy as the electron. (b) Find the speed of a proton that has the same momentum as the electron.