Aluminum rivets used in airplane construction are made slightly too large for the rivet boles to be sure of a tight fit. the rivets are cooled with dry ice (−78.5∘c) before they are driven into the holes. if the holes have a diameter of 0.6350 cm at
20.5∘c , what should be the diameter of the rivers at 20.5∘c if they are to just fit when cooled to the temperature of dry ice?

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?