The molecules in a six-particle gas have velocities
v⃗ 1=(20i^−30j^)m/s
v⃗ 2=(10i^+90j^)m/s
v⃗ 3=(−50i^+20j^)m/s
v⃗ 4=30i^m/s
v⃗ 5=(40i^−40j^)m/s
v⃗ 1=(−50i^−40j^)m/s
calculate vavg.
calculate vrms.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

What sort of waves exhibit the doppler effect?

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.