An incident energy analysis results in 2.92 cal/cm2 at 18 inches working distance with an available fault current of 30 kilometers at 480 volts when protected by a circuit breaker with published clearing time of 0.05 seconds. If the protecting circuit breaker was not adequately maintained and during an actual arc flash incident opened in one second, what would the approximate actual incident energy be at 18 inches working distance

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

The plum pudding model of the atom states that ?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.