You received a gift card for your birthday to your favorite electronics store. you are trying to decide if you should buy the really cool camera or save the gift card for a later purchase. in a brief paragraph, create a cost-benefit analysis using each of the steps to come to a conclusion.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created