Why was the bourdon tube placed into a beaker of boiling water for 5 minutes

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

Light waves can move through , but they travel fastest when they move through a(n) .