What is an unusual theoretical characteristic of quarks?
a. They have fractional charges.
b. They are outside the concept of electric charge—it just does not apply to them.
c. Even the electron is composed of quarks.
d. Even in quantum mechanical terms, quark momentum is not conserved.
e. They combine to form leptons.
a
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What properties of degenerate matter are important to the structure of stars? Why?
What will be an ideal response?
A 2000 kg car is traveling on a banked curved icy road. The velocity of the car is 25.0 m/s and the road has a radius of curvature of 500 m. If the car is to travel on the icy road without sliding, then the angle of the banked road is
A. 25.7 degrees. B. 21.0 degrees. C. 12.7 degrees. D. 10.5 degrees. E. 7.27 degrees.
Which of the following is not considered a likely solution to the question of why we are not currently aware of a galactic civilization?
A) There is no galactic civilization because civilizations are not common. B) There is no galactic civilization because civilizations do not leave their home worlds. C) The galactic civilization is deliberately avoiding contact with us. D) The galactic civilization probably is undetectable to us because it makes use of technologies that do not obey the known laws of physics. E) There is no galactic civilization because most civilizations destroy themselves before achieving interstellar travel.
A Carnot heat engine could have an efficiency of 100% only if the temperature of the exhaust were at ________.
What will be an ideal response?