How long would a 700-w microwave have to run to use the same energy as a 100-w light bulb left on for 35 min?

The microwave will run for 5 minutes using the same energy as the bulb

Explanation:

Step one

Given data

Power for microwave =700-W

Power consumption for light bulb=100W

Time =35minto hours 35/60=0.58hrs

Energy consumption for bulb =power *time

= 100*0.58

=58.33joule

If the microwave wave is to consume this same amount of energy then it will run for

Energy =power *time

Time =energy /power

Time =58.33/700

Time =0.083hrs to min=0.083*60

Time =5 minutes

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.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide