If it produces 20J of light energy in a second, then that 20J is the 10% of the supply that becomes useful output.
20 J/s = 10% of Supply
20 J/s = (0.1) x (Supply)
Divide each side by 0.1:
Supply = (20 J/s) / (0.1)
<em>Supply = 200 J/s </em>(200 watts)
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Here's something to think about: What could you do to make the lamp more efficient ? Answer: Use it for a heater !
If you use it for a heater, then the HEAT is the 'useful' part, and the light is the part that you really don't care about. Suddenly ... bada-boom ... the lamp is 90% efficient !
the answer for the question is D. all of the above
Answer:
220km
Explanation:
Given parameters:
Distance traveled from Minnehaha to Nut Plains = 11km
Distance traveled to Dover = 209km
Unknown:
The distance the soft drink distributor traveled = ?
Solution:
To solve this problem, we must understand that distance is the total length of path covered in a journey.
So;
Distance = 209km + 11km = 220km
The soft drink distributor covered 220km
An atom that no longer has a neutral charge is called an ion
