. Using the combined volume of twenty pennies, calculate the average volume of one penny.
Compare it to the accepted volume of 0.3515 cm as well as your answer for one penny.
Were either of your calculations close to the accepted value? Why or why not?

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.