Answer:
37.96usd , 9.49usd
Explanation:
From the data given we have
cost of electricity= $0.13,
and annual cost of electricity is express as
Annual cost= power *hours*days*cost of electricity
note the unit of power must be in kilowatt(Kw),
a. to determine the cost of running 100w we first convert to kw
Hence the annual cost of running it 8.00 hours per day is calculated as
b. to determine the cost of running 25w we first convert to kw
Hence the annual cost of running it 8.00 hours per day is calculated as
Hence from the answers we can conclude that less amount of money required to run the 25w incandescent bulb compare to the 100w
Answer:
Explanation:
Well, which is it, level ground or sloping upward at a ratio of 1 m rise for every 5 m of run?
I will ASSUME you mean the shadow is 32 m long as measured along the 1:5 slope and the sun is 55° above the horizon.
The ground slope to horizon is
arctan (1/5) = 11.31°
The "top" end of the shadow is above the tower base by
32sin11.31 = 6.2757 m
The "top" end of the shadow is a horizontal distance from the tower base of
32cos11.31 = 31.3786 m
The tower height above the "top" of the shadow is
h = 31.3786tan55 = 44.8132 m
so the tower height is
44.8132 + 6.2757 = 51.0889 = 51 m
Answer:
Pupil
Explanation:
Part of the eye which controls the entering of light is called Pupil
~Hello there! ^_^
Your question: A plant blossoms with violet-colored flowers. The flowers appear violet because they absorb all light rays except for____ rays.
Your answer: A plant blossoms with violet-colored flowers. The flowers appear violet because they absorb all light rays except for violet rays.
Hope this helps~
Answer:
Question 1: protons and electrons
Question 2: atomic number
Explanation: trust me