Antares is the bright blue star representing the left shoulder of the constellation Xerxes. All the following statements about Antares are true. Which one can you infer from its blue color? It is much more massive than the Sun.
It is moving away from us.
Its surface is hotter than the surface of the Sun.
It is much brighter than the Sun.

b.

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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.

f is prop to m1xm2 double m1 double force

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.