An uncharged molecule of dna (deoxyribonucleic acid) is 2.14 µm long. the ends of the molecule become singly ionized so that there is a charge of −1.6 × 10−19 c on one end and +1.6 × 10−19 c on the other. the helical molecule acts like a spring and compresses 1.4% upon becoming charged. find the effective spring constant of the molecule. the value of coulomb’s constant is 8.98755 × 109 n · m2 /c 2 and the acceleration due to gravity is 9.8 m/s 2 . answer in units of n/m.

K = 1.72 *10^{-11} N/m

Explanation:

given data:

L= 2.14*10^{-6} m

           = 2.99*10^{-8} m

electrostatic force = spring force

putting all equation to get spring constant K value

K = 1.72 *10^{-11} N/m

Density and boiling point

Explanation:

There are properties of matter that do not change regardless of how much of the substance you have. The boiling point of a cup of water, for example is te same as the full kettle of water. These are called intensive properties. Examples include, but are not limited to, density , specific heat capacity , hardness, boiling point , color  etc