Questions without answers #3

If drinking and driving is forbidden why do bars have parking lots?

Well, bars also serve non-alcoholic beverages. When a group of people visits a bar there often is a designated driver who needs a place to park the car. Also, the bar’s staff has to park somewhere.
What is also important is that many countries have a drunk driving limit, so driving under the influence of alcohol is permitted.
So, there are plenty of reasons why bars need to have a parking lot.

If nothing sticks to Teflon, how does Teflon stick to the pan?

Polytetrafluoroethylene (PTFE), better known as Teflon, is a partially crystalline polymer consisting of fluorine and carbon. It was accidentally discovered in 1938 by chemist Roy Plunkett who was searching for refrigerants and experimented with Tetrafluoroethylene (TFE).The pan’s surface is mechanically roughened by sandblasting which causes the surface to become uneven. The PTFE is then applied under pressure, sticking to the pan’s uneven surface. However, the PTFE’s surface is smooth and therefore the food doesn’t stick to it.

What’s the name of the plastic ends of shoelaces?

The hard ends of shoe laces are called aglets deriving from the Old French word aguilette, the diminutive of aguille (needle). Aguille in turn comes from the Latin word acus (needle).

If a shop is open 24/7 all year, why does it need door locks?

Firstly, I have never seen a shop door without locks.
Anyways, I think there are various reasons for these shops to have locks on their doors. The shop can be closed due to its owners being on vacation or ill. On the other hand shops need repairs.
However, some shops are open 24/7 but still have their doors locked at certain times; e.g. gas stations. Their doors are locked at (I think) 10 p.m. so customers have to use the night desk to buy goods or pay for gas. This is done for reasons of security as gas stations are often robbed at night. So, there are enough reasons for these shops to have locks on their doors.