A blimp has a velocity of 8.2 m/s due west relative to the air. There is a wind blowing at 3.5 m/s due north. The speed of the balloon relative to the ground is
A. 11.7 m/s
B. 8.9 m/s
C. 7.4 m/s
D. 4.7 m/s
E. Some other speed (specify)
B. 8.9 m/s
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That brighter Sirius A weighs 3 solar masses, but the white dwarf Sirius B is only about one solar mass implies:
A) that white dwarfs evolve slower than main sequence stars. B) that the collapsed companion transferred mass to Sirius A. C) that there should be a planetary nebula around the Sirius system. D) that Sirius A will be stable three times longer than Sirius B. E) the Sirius A will end up as a black hole, not a white dwarf like its companion.
State the Second Law of Thermodynamics
What will be an ideal response?
A vector with zero magnitude can have one or more components that are nonzero
Indicate whether the statement is true or false
An astronaut is piloting a spacecraft, which is in a circular orbit around Earth. A space station is ahead, on the same circular orbit. If he fires his rockets briefly to decrease the forward speed of the rocket, what will happen?
What will be an ideal response?