A K0 particle at rest decays into a + and a . What will be the speed of each of the pions? The mass of the K0 is 497.7 MeV/c2 and the mass of each is 139.6 MeV/c2.
[Ques. 2] The plane of Earth's equator is tilted ______________ with respect to the plane of Earth's orbit about the Sun.
a. 90
b. 18
c. 5
d. 23.5
e. 180
[Ques. 3] The SI unit of heat is the ______________.
Fill in the blank(s) with correct word
[Ques. 4] A photon with an energy of E = 2.090 0 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95.0 MeV. What is the kinetic energy of the antiproton? (mpc2 = 938.3 MeV)
[Ques. 5] The altitude of the North Star (Polaris) is approximately
a. 90.
b. equal to the observer's local latitude.
c. equal to the observer's local longitude.
d. dependent on the time of day.
e. none of these
[Ques. 6] The ice point and the steam point of water are commonly called the ______________ point and the ______________ point, respectively.
Fill in the blank(s) with correct word
[Ques. 7] The three quarks in any baryon must all have different
a. baryon number.
b. color charge.
c. electric charge.
d. lepton number.
e. spin.
[Ques. 8] At different times of the year, the Sun appears to be in different parts of the sky among different groups of stars. This is so because
a. Earth revolves about the Sun.
b. the Sun rotates on its axis.
c. the Sun moves through space.
d. stars move.
e. Earth rotates on its axis.
[Ques. 9] Below 4C, water ______________ with decreasing temperature.
Fill in the blank(s) with correct word
[Ques. 10] A + particle, composed of uus quarks, has the same ____ as a proton.
a. baryon number and charm.
b. baryon number and electric charge.
c. baryon number and strangeness.
d. baryon number, electric charge, and charm.
e. electric charge and strangeness.
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