A student is attempting to determine the coefficient of static friction between a coin and a steel plate. The student attaches the center of the plate to a freely rotating axis. For each trial, the student sets the coin on different positions on the steel plate and measures the distance from the center of the coin to the center of the axis of rotation. The student also has a stopwatch to measure the period T of the plate's rotation Required:
Explain how the student can use this setup to take measurements that would allow the coefficient of static friction to be calculated.

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the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

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.