The drawing shows a golf ball passing through a windmill at a miniature golf course. the windmill has 6 blades and rotates at an angular speed of 1.90 rad/s. the opening between successive blades is equal to the width of a blade. a golf ball (diameter 4.50 10⁻² m) has just reached the edge of one of the rotating blades (see the drawing). ignoring the thickness of the blades, find the minimum linear speed with which the ball moves along the ground, such that the ball will not be hit by the next blade.

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?