Two pendulum bobs are hung from strings of the same length. The first bob, of mass m, is released from a height h above the second bob, which has mass 2m. Treat each bob as a point mass. When the first bob hits the second, they stick together and rise to a maximum height H given by:

Sound energy is produced when an object vibrates. examples are 1- a balloon popping2-a whistle3- a waterfall

When you go to ask a qustion there will be a picture of a paper clip looking thing and then it will pop up your files and you click on the imajes and then you up load it

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current