What will most likely happen if a sound wave moves from the air through a solid?

It will increase in wavelength.
It will decrease in speed.
It will increase in speed.
It will decrease in wavelength.

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?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

How can you increase the strength of an electromagnet?