Atrain moves east with a speed of 31 m/s. a man on the train walks west
with a speed of 0.7 m/s relative to the train. how long does it take the man to
move 34 m relative to the train?
o a. 1.1 s
o b. 37 s
o c. 255
d. 49 s.

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

If we relied solely on the nonrenewable resources found in the u. s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

How much heat is needed to raise the temperature of 5g of water by 16°c?