The root-mean-square speed (thermal speed) of the molecules of a gas is 200m/s at 23.0°c. at 227°c the root-mean-square speed (thermal speed) of the molecules will be closest to (1) 160 m/s. (2) 330 m/s. (3) 260 m/s. (4) 630 m/s. (5) none of the above.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

Which atomic model was proposed as a result of j. j. thomson’s work?