The human lungs can function satisfactorily up to a limit where the pressure differ- ence between the outside and inside of the lungs is one-twentieth of an atmosphere. if a diver uses a snorkel for breathing, how far below the water can she swim? assume the diver is in salt water whose density is 1025 kg/m3.

The correct answer is 0.53 meters.

Explanation:

The given density of water is 1025 kg/m^3

Gauge pressure, that is, (P2 - P2) = Po/19

Here Po = 1.013 * 10^5 Pa

= 1.0.13 * 10^5 Pa / 19 = 5331.58 Pa

The change in pressure associated with the depth is given by the formula:  

P2 -P1 = ρgh  

h = P2 - P1 / ρg

h = 5331.58 Pa / 1025 kg/m^3 * 9.8 m/s^2

h = 0.53 m

Thus, the driver can swim 0.53 meters below water.  

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.