Exam 32: Elementary Particles

If a new force were discovered with a range on the order of $10 ^ { - 18 } \mathrm {~m}$ , predict the approximate mass of the exchange particle. $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$

The $\pi 0$ meson has a mass of 264 times that of an electron. What is the approximate range of the force mediated by this particle? ( electron $^ { \text {e } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 }$ J.s)

Inside the nucleus, the weakest of the four fundamental forces is

How many quarks are in a deuteron, ${ } _ { 1 } ^ { 2 }$ H?

Which of the following particles are not made up of quarks? (There could be more than one correct choice.)

How many quarks are in a tritium isotope, ${ } _ { 1 } ^ { 3 } \mathrm { H }$ ?

Which of the following statements about hadrons are correct? (There may be more than one correct choice.)

Inside the nucleus, the strongest of the four fundamental forces is

Elementary particles that experience the weak nuclear force but not the strong nuclear force are called

How does the range of an exchange force depend on the mass of the exchange particle?

The proton is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

Calculate an estimate of the range of a hypothetical force with the proton as the virtual exchange particle. $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , m _ { \text {proton } } = 1.67 \times 10 ^ { - 27 } \mathrm {~kg} \right)$

Which of the following particles are leptons? (There may be more than one correct choice.)

Leptons can interact by which of the following forces?

The neutron is made up of which one of the following quark combinations (up, down, strange, charm, top, bottom)?

What are the possible charges of a quark (not an antiquark)?

Which of the following particles (or groups of particles) are made up of quarks?

What combination of quarks produces a neutron and what are the electric charges on these quarks, expressed in terms of e?

What combination of quarks produces a proton and what are the electric charges on these quarks, expressed in terms of e?