Find the kinetic energy of a ball of mass 200 grams moving at a speed of 20 m/s.​

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?

How do we measure or think of speed in the united states?

How can waves travel through ground?