What is the resistance of a 2.0 m copper wire ( p= 1.7 10∧-8 mω-m) that has a cross-sectional area of 2.08 x 10∧-6 m∧2? a. 1.6 10∧-2ω b. 6.1 10∧1 ω c. 4.1 10∧-3 ω d. 2.4 10∧2 ω

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Are formed where bumps from two surfaces come into contact ?