In infinite cylinder of radiusacarries a surface current that increases with time,~K=αtˆφ, whereαis a constant. Let thezaxis be the axis of the cylinder. Themagnetic field in the quasi-static approximation is given b

What is the role of the ocular lens?

Which example has gravitational potential energy? a.a horse slowing down from a run b.an apple about to fall from a tree branch c.a bicycle being pedaled down a horizontal path d.beaker sitting on the floor

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?