A portable CD player, operating with four 1.5V batteries connected in series, provides a resistance of 10000 Ohms. What amount of current is flowing through the CD player?

i believe the answer is a

the answer is b, have negligible mass

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.