Calculate a) the x- and y-components of the momentum vector of a 25 kg mass traveling at 120 m/s in a direction of 120 degrees relative to the +x-axis and b) the magnitude of the momentum vector and c) the angle of the momentum vector. a mass of 40 kg travels to the right at 32 m/s. a second mass of 25 kg travels to the left at 54 m/s. calculate the total vector momentum of the system of masses. 7. a 6.5 kg rife fires a 4.5 gram bullet with muzzle velocity of 820 m/s. calculate the recoil velocity of the rifle.

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

The upward force acting on the wing of a airplane in flight is known as the "lift" force. (d)

The answer is d, you can easily test a theory! hope i you : )