If two straight lines start out parallel but eventually cross, then they must be in a
A) spherical geometry.
B) flat geometry.
C) saddle-shaped geometry.
D) spacetime geometry.
A) spherical geometry.
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For a monatomic gas, 3R/2 is
a. the specific heat per mole at constant volume. b. the specific heat per unit mass at constant volume. c. NAkB. d. none of the above.
In a fusion reactor, the high temperature of the order of 108 K is required in order that what condition is met?
a. melt down the hydrogen fuel b. strip the hydrogen atoms of their electrons c. break the protons into their elementary particle sub-parts d. overcome Coulomb repelling forces between protons
) Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar mass). How would Earth's orbit change?
A) Earth would almost instantly be sucked into oblivion in the black hole. B) Earth would orbit faster, but at the same distance. C) Earth would slowly spiral inward until it settled into an orbit about the size of Mercury's current orbit. D) It would not change; Earth's orbit would remain the same.
Websites with an asymmetrical arrangement appear centered or even.
Answer the following statement true (T) or false (F)