How do you determine the specific heat of a substance? A. Divide the enthalpy change by the change in temperature.
B. Divide the enthalpy change by the product of the mass and change in temperature.
C. Divide the change in temperature by the product of the mass and enthalpy change.
D. Divide the change in temperature by the change in enthalpy.

I think it's A

Explanation:

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

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.