Compare and contrast longitudinal and transverse waves.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

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?