Plz help 22
19. Consider the circuit of figure 17-
where R1 = 40 2, R2 = 10 2,
the generator sends a current of
1 A.
Calculate the resistance of the resistor
equivalent to Ri and R2.
a-
a
b- Calculate the volatge U across the
generator
104 Electricity
+ question c in the picture above

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.