2. A circuit contains, in series, a generator
(4.5 V; 1.5 2) and two resistors R1 = 25
12 and R2 = 18.5 12. Calculate the
current in the circuit by:
a. Applying the law of uniqueness of the
voltage between the terminals of the
generator

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.