Why can't the button on the lift work if something is covering your finger(eg. gloves/plaster)?
I think its because of the material of the fabric that causes you to be unable to press the button..Or maybe to press the button it needs to sense heat before it lights up and everything.And if you wear gloves/plasters,the fabric 'blocks' or absorbs the heat and therefore no heat is sensed at the button.


Why does ice 'stick' to your fingers when you take it out of the refridgerator?
First,we have to look at the formation of ice.Ice is the solid state of water,so we look at the formation of water.

Water (H2O) is made up of two molecules of hydrogen and one molecule of oxygen. But oxygen has the two extra pairs of electrons which are known as lone pairs.Every molecule in the water is attached with the nearby molecule through hydrogen bonding.When water is in liquid state every molecule changes its interaction and makes new connections with new molecules which results in water flow. However in its solid state(ice) it cannot break old connections and form new ones.Now the molecules are not in the condition to change their interactions so they remain in one place forming a three dimensional hydrogen bonding.

On the surface of ice some oxygen atoms and hydrogen atoms are left facing outwards which causes them not to connect with the other molecules to form hydrogen bonds. So they are looking for a partner to form the bond.When a surface that is able to form this bond comes in contact with the ice surface it will stick to that, like our skin. Our skin has high moisture content and very appropriate to form the bond with these atoms that is why it sticks to your skin when you touch it.

http://www.letusfindout.com/why-does-ice-stick-to-your-skin/

rained @ 2:18 AM