Which of the following is typical of a Jovian planet?
A. an orbit inside the asteroid belt
B. a hydrogen-poor composition
C. the presence of many moons
D. an average density about that of rock
E. evidence for volcanic activity
Answer: C. the presence of many moons
You might also like to view...
One hundred meters of a certain type of wire has a resistance of 7.2 
What is the resistance of 2.5 m of this wire?
A. 18
B. 1.8
C. 0.18
D. 3.0
E. 0.30
Why do stars appear to twinkle?
What will be an ideal response?
Can two microscopic [or quantum] particles be entangled even when they are exerting no forces on each other?
A) Yes, because they can still communicate with each other by means of electromagnetic radiation. B) Yes, they could be entangled but so far apart as to exert no significant forces on each other. C) No, because entanglement occurs only by means of the electromagnetic force and the other fundamental forces. D) No, because in order for a particle to be trapped in the field of another particle, it must feel the second particle's force field. E) No, because the psi field is actually a force field.
A particle (q = +5.0 mC) is released from rest when it is 2.0 m from a charged particle which is held at rest. After the positively charged particle has moved 1.0 m toward the fixed particle, it has a kinetic energy of 50 mJ. What is the charge on the fixed particle?
a. -2.2 mC b. +6.7 mC c. -2.7 mC d. +8.0 mC e. -1.1 mC