An object starts from rest and slides with negligible friction down an air track tipped at an angle θ from the horizontal. A student records values of the object’s position along the track at various times. The value of θ can best be determined from which of the following?

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 a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

How can you increase the strength of an electromagnet?