A 15 m long wire is placed horizontally on the surface of a liquid and is gently pulled up with a force of 60 to keep the wire in equilibrium. What is the surface tension of the liquid?

Explanation:

From the question we are told that

    The length of the wire is  

     The force with which its pulled up is  

The surface tension of the liquid  is mathematically  represented as

substituting values  

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50