Bronze does not rust the way that iron does, bronze will corrode, but at a much slower rate than iron.
You can check your pulse rate with a gadget or simply with counting. If you want to check your pulse rate with a machine, check Pulse rate monitors. You can wear a watch and get your pulse rate directly to the watch! You can also count it yourself. You can check it if you put your finger on these kinda places: *wrists *Inside of your elbow *Inside of your neck *Top of your foot
Bronze plaques can be purchased from most trophy and engraving stores. They can be found at brick and mortar stores, but a good bet might be to check out online retailers.
You could dumpster dive, check out flea markets and yard sales, buy the scrap from a company that uses bronze, or buy it from a scrap yard, or from a million sources online.
7%.
I would check the heart and respiration rates separately to make sure you are accurate. Especially dealing with babies. Use a stethoscope to check the heart rate and just count the time their chest rises and falls for respiration rate.
Check out the related link to see a picture.
To establish your "resting" heart rate.
check NEC
You check your pulse.
The discovery of Bronze gave merit to the alloying of metals. Metalworkers quickly created more durable bronze versions of many previously stone, wood, ivory or copper tools. The unique properties of Bronze inspired its use in seafaring, construction, cannonry, mechanics, woodworking, mold-cast scuptures, and music. Additionally, language and writing seem to have evolved at a greater rate in cultures that adopted or invested in Bronze technology.
Check their website.