2. an optical fibre is 1200km long and it takes light 0.006s to travel from one end to the other. calculate the speed of light in glass.
2. an optical fibre is 1200km long and it takes light 0.006s to travel from one end to the other. calculate the speed of light in glass.

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

What is the coefficient of kinetic friction μk between the block and the tabletop?