Lowest frequency standing wave: fundamental. The lowest standing wave frequency is called the fundamental or first harmonic. For this mode, all parts of the string vibrate together, up and down. Of course, the ends of the string are fixed in place and are not free to move. We call these positions nodes: a node is a point on the string that does not move.
You need protein for your muscles, bones, and the rest of your body. Exactly how much you need changes with age: 1  Babies need about 10 grams a day.2  School-age kids need 19-34 grams a day. 3  Teenage boys need up to 52 grams a day. 4  Teenage girls need 46 grams a day. 5  Adult men need about 56 grams a day.6  Adult women need about 46 grams a day (71 grams, if pregnant or breastfeeding).xactly how much you need changes with age: 1  Babies need about 10 grams a day. 2  School-age kids need 19-34 grams a day. 3  Teenage boys need up to 52 grams a day. 4  Teenage girls need 46 grams a day.
The amount of protein that you need daily, or the recommended daily allowance (RDA), depends on your age and body size, but most teens need between 40 and 60 grams of protein each day. To figure out exactly how much you need, youâll need to do a little math. If youâre 11-13 years old: Multiply your weight in pounds by 0.455; this gives you about how many grams of protein you need each day. For example, a 12 year-old who weighs 100 lbs would need about 45.5 grams of protein (100 lbs x 0.455 = 45.5).