Tsunamis are. Group of answer choices

waves that cannot cause damage on land

waves that are produced by tidal forces

often generated by movements of the ocean floor

also known as tidal waves

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .

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

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.