A phone charger transforms AC into DC electricity to charge your mobile phone if the charger is 85% efficient. a) What is the energy needed to obtain 1200 J of DC?

Arescue plane flying horizontally at spots a survivor in the ocean directly below and releases an emergency kit with a parachute. because of the shape of the parachute, it experiences insignificant horizontal air resistance. if the kit descends with a constant vertical acceleration of, how far away from the survivor will it hit the waves?

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx