Asubmerged scuba diver hears the sound of a boat horn directly above her on the surface of the lake. at the same time, a friend on dry land 22.0 m from the boat also hears the horn (fig. e16.7fig. e16.7). the horn is 1.2 m above the surface of the water. what is the distance (labeled "? ") from the horn to the diver? both air and water are at 20∘∘c.

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.