2. A circuit consists of a 10.0-ohm resistor,
a 15.0-ohm resistor, and a 20.0-ohm
resistor connected in parallel across a
9.00-volt battery. What is the equivalent
resistance of this circuit?
(1) 0.200 12 (3) 4.62 1
(2) 1.95.22
(4) 45.012

Can someone answer my last question i posted? on my last post? my hw is due tomorrow and i’m confused.

As the ball rolls down the ramp, there are changes in kinetic and potential energy. how much kinetic energy does the ball have when it reaches point b? a) 0j b) 25j c) 50j d) 100

No matter what energy transformation we discuss, we know that no energy transfer is 100% efficient. you are about to enter a bicycle rave. you have trained extensively and eaten well to maximize your energy input throughout the bicycle race. you know that some of your kinetic energy will become wasted energy in the form of heat. what is the source of the heat energy and how can you minimize it to maximize the efficiency of your performance in the race? a) you are the source of the heat energy. you can minimize the heat energy but selecting the appropriate clothes to wear. b) air resistance is the source of he heat energy. you can minimize the air resistance by your position while riding the bicycle. c) friction is the source of the heat energy. you can minimize the friction by lubricating all appropriate parts and keeping the tires well inflated. d) kinetic energy is the source of the heat energy. you can reduce the production of heat energy but minimizing the energy you expend to race on the bicycle.