The linear expasivity of a substance
is 1.2x10 raise to the power of -4
a cube of the Substance
has a volume of 8.0x 10 at 10 raise to the power of 3 at 30°c,
Calculate the increase in its Volume at 80 degree Celsius

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?