A current of 4 A flows from a battery when a light bulb is connected across its terminals. The p. d. across the terminals is 12V. a) What quantity of charge leaves the battery every second?
b) How much potential energy does each coulomb leaving the battery possess?
c) How much charge must be given out by the battery if it is to supply 60 joules of energy?
d) How long does the battery take to supply 60 joules of energy?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

Could someone . i have tried to solve myself but my calculation is off