Ablock of sodium that has the measurements 3.00 cm x 5.00 cm x 5.00 cm has a mass of 75.5 g. calculate the density of sodium.

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

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

Which model displays the change in a gas when the temperature of the gaseous system decreases?