what year and country are we talking and is it a hatch or sedan?
The key of a capo should be placed on a specific fret of the guitar to change the pitch of the strings.
Yes
A vernier caliper
Do you mean before or after the mercury battery explodes in your mouth? Listen those barbells are dangerous, they were supposed to be removed from the market due to the risk factors of poisoning and choking. Mercury batteries are never supposed to be placed inside the mouth for obvious reasons.
A capo raises the pitch of all the strings on a guitar when placed on the neck, effectively changing the key of the music being played.
The caliper or "pinch an inch" can be fairly reasonable if the tester administered the test correctly. They might not have placed it in the right spot or could have even not separated the muscle from the fat , which would give false readings.
The mattress pad is meant to be placed on top of the mattress and directly under the bottom sheet.
An IUD (intrauterine device) is placed inside the uterus by a healthcare provider.
Ink. It is a thick, artificial, liquid substance that is used to stain paper. It is commonly placed inside a small tube which is placed inside the pen.
If the wheel is not out of round & if the size is not smaller than stock, look & see if they used stick on wheel weights to balance. Those are usually placed inside for appearance reasons & may be hitting caliper.. The caliper even if it's bad won't move. You may have snapped the rotor or you could be metal to metal due to worn out pads. See if you have any material left on them, that may also be where the sound is coming from.
look inside
it will get cold.