Which of the following makes a meson?
a) a photon and a graviton
b) an up quark and an anti-down quark
c) three up quarks
d) a charm quark and a strange quark
e) two down quarks and an anti-up quark
Answer: b) an up quark and an anti-down quark
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A projectile is fired into the air at an angle of 50° above ground level and hits a target downrange. It will also hit the target if fired at an angle of
A) 40°. B) 45°. C) 55°. D) 60°. E) none of the above
Venus can be seen during daytime when it is near greatest brilliancy
Indicate whether the statement is true or false
The 99 years that revolutionized Astronomy ended with whose death?
a. Aristotle b. Kepler c. Tycho d. Copernicus e. Galileo
You stand by the railroad tracks as a train passes by. You hear a 1 020-Hz frequency when the train approaches, which changes to 760 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s
a. 30.2 m/s b. 34.5 m/s c. 40.1 m/s d. 49.7 m/s e. 45.6 m/s