2. Heather and Matthew walk with an average velocity of +0.87 m/s eastward. If it takes them 27 minutes to walk to the store, what is their
displacement? (include direction)
(5 points)

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.