4. A stroller walks the first half of a straight 1.4 km trail at a steady pace of 1.7 m/s, east. He walks the second half at a constant stride of 0.37 m/s, east. What is his average velocity along the trail?

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

if i am correct, your answer choices are:

a. the temperature remains constant

b. the temperature increases at a constant rate

c. heat flows at a constant rate into the system

d. heat flows at a constant rate out of the system

e. no heat flows into or out of the system

if so, then the answer is e. no heat flows into or out of the system.

it's