when you crack your fingers, your fingers can't bend when you're older.
When a cup is filled with boiling water, the heat from the water caused the material of the cup to experience thermal expansion. If the cup is badly made, then different parts of it will expand to different extents and this will create stresses in the material of the cup causing it to crack.
Since glass is a poor conductor of heat, it may crack on uneven heating. Therefore, in order to heat it evenly, you have to rotate the glass tubing.
Ive seen this happen when dramatic changes in temperature happen e.g. its hot outside and you get cold water the window..
they r called contraction joints. then every few of those then expansion joint. concrete is going to crack, so make it crack so it can't be seen,under the man made ones. concrete tends to crack symmetrically. so if ur sidewalk is 3 feet wide the contraction joints will be every 3 feet. then expansion joint, 3/4 inch with expansive material, every 4th one.
If its a branch or a crack I would just trick over it. When the sidewalk is uneven, slow down abit.
yes, the process is called exfoliation
A plastic radiator will crack under extreme over heat conditions for example a defective thermostat or bad cylinder head gasket will cause a cooling system to over pressurise and rupture.
Heating and Cooling
Crack.
Moisture
Crack.
crack
yes and no if it is like a foundation it could be because your foundation is settleing and is gettin uneven and can continue to crack
Crust
chicks in high heels
I think it is aluminum sheet