Ametal bar with length oa = l is rotating in a counter-clockwise manner about the point o with a constant angular velocity ω. there is a constant magnetic field b directed out of the paper. l +q c v a ω o b b b the length of the bar is 10 m and the magnitude of the magnetic field is 2 t . the speed of the bar at point c is 81 m/s, and the length of oc = 7 m . determine the magnitude of the potential difference |vo − va| .

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87