An aluminum Bar of length 0.5 is heated from room temperature (22 C) to 127. How much longer is the bar?
Alpha = 25 x 10-6

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above