Show your work: Find the gravitational force between a lead sphere with a mass of 5.0kg and another with a mass of 0.3 kg when they are placed 2.0mm apart? (Watch your units!)

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

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?

Why do different substances have diffrent properties