A tire that has been run flat has just been removed from an Alcoa aluminum rim. Technician A states to roll the rim on a flat level surface for a minimum distance of 10 feet to ensure that it rolls in a straight line. Technician B states to use a square to ensure that there is no more than .030 gap between the square and the rim flange. Who is correct?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

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

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?