As an incompressible fluid in a pipe flows past a region where the pipe gets narrower:
a. the fluid flows faster.
b. the fluid flows more slowly.
c. the speed of the fluid remains the same.
d. the number of gallons of fluid per second increases.
e. the number of gallons of fluid per second remains the same.
a
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When a star collapses to form a black hole, its mass
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