The ammonia molecule (nh3) has a dipole moment of 5.0 x 10 ammonia molecules in the gas phase are placed in a uniform electric field e with magnitude 1.00 x 106 n/c. (a) what is the change in electrical potental energy when the dlpole moment of a molecule changes its orlentation with respect to e from parallel to perpendicular? (b) at what absolute temperature t is the average translational kinetic energy 3/2kt of a molecule equal to the change in potential energy calculated in part (a)? (above this termperature, thermal agitation prevents the dipoles from allgning with the electric field.)

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.

Which branches of natural science include the study of an organism that lived 10 million years ago

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