Select the two statements that explain why fewer waves were recorded at
some stations
A. Part of Earth's interior bent some of the waves.
B. Different materials in Earth reflect some of the waves.
C. Some waves are blocked by water on the Earth's surface.
D. Weather events near the stations can prevent waves from being recorded.

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

The heliocentric and the geocentric models of the solar system included these central principles