When you ride your scooter you have momentum. When you ride twice as fast you have
A) almost twice the momentum.
B) twice the momentum.
C) four times the momentum.
D) none of the above
Answer: B
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Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar mass). What would happen to Earth in its orbit?
A) Earth would almost instantly be sucked into oblivion in the black hole. B) Nothing; Earth's orbit would remain the same. C) Earth would slowly spiral inward until it settled into an orbit about the size of Mercury's current orbit. D) Earth would orbit faster, but at the same distance.
The presently known laws of physics clearly describe the conditions inside a black hole's event horizon
Indicate whether the statement is true or false
The rounding of the sharp edges and corners of rocks is called
What will be an ideal response?
The recently dwarf planet Eris has an orbital period about the Sun, P, of 557 years. According to Kepler's 3rd Law, what is the semi-major axis, a, of its orbit?
A) 55.7 AU B) 38.4 AU C) 72.1 AU D) 67.7 AU