19. A salesperson drove north 224 km from Minnehaha to Yellville. He then turned around and drove back south for 249 km to Mount Carmel. The total trip took 5 hours What was the salesperson's average velocity for the entire trip?
"Round your answer to two decimal places if necessary
0 -0.69 km per hour
O 5 km per hour
0 5.72 km per hour
2.56 km per hour
O None of these is correct

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k