An electron moving at constant speed produces
(1) a magnetic field, only
(2) an electric field, only
(3) both a magnetic and an electric field
(4) neither a magnetic nor an electric field

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

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?

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n