In a certain city, electricity costs $0.16 per kw⋅h. what is the annual cost for electricity to power a lamppost for 7.00 h per day with a 100. w incandescent light bulb versus an energy efficient 25 w fluorescent bulb that produces the same amount of light? assume 1 year=365 days.

So, you can save $ 40.89 - $ 10.22 = $ 30.67 per each lampost if you replace the incadescent bulb with the energy efficient fluorescent bulb.

Explanation:

kW.h means kilowatt.hour and is a unit of energy derived from the definition of power.

The definition of power is energy per time:

Thus, you get:

For the units, you get:

1. Calculate the energy used by the 100 W incandescent light bulb that is used 7.00 h per day, in a year (365 days).

2. Calculate the energy used by the 25 W flourescent bulb:

3. Now, you can calculate both costs:

    100 W bulb:

     25 W bulb:

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation:

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.