How much current does a 310 W device draw when given a voltage of 120 V?

- 3.6•10^4 A

- 4.0•10^-2 A

- 4.2•10^2 A

- 2.6•10^0 A

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

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

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.