A piece of diamond and a piece of glass, which shine more ? Why ?

Among objects made of glass and diamond, which one shines more ? Why ?

Why is diamond hard ?

A piece of charcoal and a piece of shining steel of the same area are kept for a long time in an open lawn in bright sun. a) The steel will absorb more heat than the charcoal b) The temperature of the steel will be higher than that of the charcoal c) If both are picked up by bare hands, the steel will be left hotter than the charcoal d) If the two are picked up from the lawn and kept in a cold chamber, the choreal will lose heat at a faster rate than the steel

A piece of copper and a piece of germanium are cooled from temperature to 80 K . Then which one of the following is correct ?

They cut leaves into pieces and create a bed to grow a type of fungus which they eat which organism is discussed here?

Why diamond is hard compared with graphite?