What is the key difference between a liquid and a gas?
a. intermolecular attractions
c. average kinetic energy
b. the ability to flow
d. the motion of their particles

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

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

2select the correct answer. javed suffers from a severe food allergy. which device should javed always carry? a. inhaler b. epi pen c. nebulizer d. insulin pen