In chemical equations, numbers placed before formulas are known as ______________
Fill in the blank(s) with correct word
coefficients
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Matter falling into a black hole forms a(n) _______________ disk
Fill in the blank(s) with correct word
A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (?4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?
a. 4.2 m b. 3.5 m c. 5.3 m d. 6.4 m e. 5.0 m
A tennis ball is held above and in contact with a basketball, and then both are simultaneously dropped. The tennis ball bounces off the basketball at a fairly high speed. This is because:
a. the basketball falls farther than the tennis ball. b. the tennis ball is slightly shielded from the Earth's gravitational pull. c. the massive basketball transfers momentum to the lighter tennis ball. d. the tennis ball has a smaller radius.
Answer the following statement(s) true (T) or false (F)
1. A current-carrying circular loop and a current-carrying straight wire create very different magnetic fields in the empty space that surrounds them. Even so, the curl of at a distance r from the center of the loop along its axis and the magnitude of the curl the same distance r from the wire’s center have the same numerical value.