The net charge of 3 mol of protons is
a) 4.81×10 4 c .
b) 3.00 c
c) 4.81×10 −19 c
d) 2.89×10 5 c

Asystematic approach to problem solving is called a (an)

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm