You are working at a company that manufactures electrical wire. gold is the most ductile of all metals: it can be stretched into incredibly long, thin wires. the company has developed a new technique that will stretch 1.60 g of gold into a wire of length l = 2.20 km and uniform diameter. your supervisor gives you the task of determining the resistance of such a wire (in mω) at 20.0°c. (the density of gold is 19.3 ✕ 103 kg/m3.)

Explanation:

Given

mass of gold

Length of wire

Resistivity of gold

density of gold

and

And

also be written as

where

answer; i believe that the correct answer is (d) a very small amount of mass

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.