As a box is pushed 30. meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300. Joules. How much total internal energy is produced during this process

The value of the total internal energy produced during this process is 450 J.

Explanation:

The expression for the work done in terms of force and displacement is as follows;

W=Fs

Here, W is the work done, F is applied force and s is the displacement.

Calculate the work done.

Put F= 25 N and s= 30 m in the above expression.

W=(25)(30)

W= 750 J

The expression for the work done in terms of the change in the kinetic energy from work energy theorem is as follows;

Here, is the change in the kinetic energy.

Total internal energy= work done - kinetic energy

Put work done= 750 J and kinetic energy= 300 J.

 Total internal energy=750 - 300

                                 = 450 J

The remaining energy will get transformed into internal energy.

Therefore, the value of the total internal energy produced is 450 J.

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.

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.