Posted by Danny on Thursday, December 3, 2009 at 8:25pm.
Hi im new so maybe one of you can help me understand this question, can't find it anywhere in the book.
A person weighs 723N in air and has a body-fat percentage of 29.3% .
What is the overall density of this person's body?
What is the volume of this person's body?
Find the apparent weight of this person when completely submerged in water?
So very confused
- Physics - MathMate, Thursday, December 3, 2009 at 10:55pm
There are two formulas used for calculating body-fat (fraction) from density:
Brozek formula: BF =(4.57/ρ-4.142)
Siri formula is: BF = (4.95/ρ−4.50)
Take the inverse of the first one:
or the Siri formula:
Use the average of 1.031
Mass = 723N/9.8
Volume = mass/density
Apparent weight in water and neglecting density of air
= 73.8*(1.031-1)= 2.3 kg.
Answer This Question
More Related Questions
- AP Physics - Hi im new so maybe one of you can help me understand this question...
- Physic - A person weighs 872 N in air and has a body fat percentage of 20.7%. a...
- PE help pls - Why is it more important to know the amount body fat as opposed to...
- physics - To determine an athlete's body fat, she is weighed first in air and ...
- Chemistry - If an athlete weighs 153lb and has 15.0% body fat by weight, how ...
- Physics - A person consumes 2500 kcal/day while expanding 3500 kcal/day. In a ...
- physics - A revolutionary new diet advertises that one can lose weight simply by...
- Health/ Math - A healthy amount of body for young men is 8 to 20 percent of body...
- Health - Body fat is defined as the proportion of fat that is in your body ...
- statistics - sing the proper average, find the average number of grams of fat ...