Which statement accurately describes a p wave?

a. a p wave moves particles up and down or side to side.
b. a p wave can move through solid rock only.
c. a p wave can travel through liquids.
d. a p wave travels more slowly than an s wave.

Why are shark population in decline worldwide?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Which statement about portugal is not true? a. it granted independence to its last colony in 1975 b. it has avoided conflict with spain c. it was a leader in european world exploration in the 1400s d. its economy is changing from agricultural to industrial b. it has avoided conflict with spain