A wire of length 5cm is heated from a temperature of 20c to 70c if it undergoes a change in length of 2cm. calculate the linear expansivity of the wire

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

Work = force × a. work b. energy c. distance d. momentum

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount