As waves enter shallow water, wave speed
A) decreases, causing the wave to bend perpendicular to the shore.
B) increases, causing the wave to bend parallel to the shore.
C) decreases, causing the wave to bend parallel to the shore.
D) increases, causing the wave to bend perpendicular to the shore.
Answer: C
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Using the assumption that it takes several billion years for complex life to evolve in a stable environment, it is most likely that the stars with inhabited planets are:
A) G and K main sequence stars. B) white dwarf stars. C) A and B main sequence stars. D) neutron stars.
The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar
Indicate whether the statement is true or false
Many medium-mass stars will expel its outer atomosphere to form a(n) _______________ nebula as they age
Fill in the blank(s) with correct word
A solid ball of mass 1.0 kg and radius 10 cm rolls with a forward speed of 10 m/s when it comes to a hill. There is enough friction on the hill to keep the ball from slipping as it rolls up
(a) How high vertically up the hill can the ball roll before coming to rest? (b) How high vertically could the ball go if the hill were totally frictionless? (c) How is it that the ball can go higher with friction than without friction?