Asyringe containing 12.0 ml of dry air at 25 c is placed in a sterilizer and heated to 100.0 c. the syringe is sealed, but the plunger can move and the volume can change. what is the volume of the air in the syringe at 100.0 c, assuming no change in pressure?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?