Consider the phase change taking place in the picture. you could use all but one statement to describe what is happening here. that is:
a) temperature is increasing.
b) kinetic energy is increasing.
c) the space between the particles remains the same.
d) the attractive force between the particles is decreasing.

C) The space between the particles remains the same.

Explanation:

The figure is missing - find it in attachment.

The figure represents the change of phase from liquid state to gas state (evaporation). In fact, we can see that:

- At the beginning, atoms are close to each other but are not tightly bound --> this means that the substance is in liquid state

- At the end, atoms are free to move far apart from each other --> the substance is now in gas state

After a phase change from liquid to gas:

- The average kinetic energy of the atoms increases (because now they can move faster)

- As a consequence, the temperature (which is related to the average kinetic of the atoms) increases as well

- Since the distance between the atoms is larger, the attractive force between them is smaller

Therefore, the only false statement is

C) The space between the particles remains the same.

In fact, we can easily see from the picture that this is not true, as the distance between the particles increases.

what type of charge does it have? negative

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.