The amount of energy converted to light by an incandescent light bulb is about
A) 10% and the amount converted to heat about 90%
B) 90% and the amount converted to heat about 10%.
C) either of these depending on the brand.
Answer: A
You might also like to view...
A body moving with constant speed cannot be accelerating
Indicate whether the statement is true or false
At the lower left of the Hertzprung—Russell diagram we find
A) supergiant stars B) red giant stars C) white dwarfs D) main sequence stars
A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is 60 lbs
a. True b. False Indicate whether the statement is true or false
An object that is negatively charged will
a. attract a rubber rod stroked with fur. b. attract a glass rod stroked with silk. c. be polarized. d. none of these