Related Questions

The amount of combustible escaping uncon-sumed from the furnace, depends upon the
A Air supplied and furnace temperature
B Burner design (thoroughness of mixing versus stratification)
C Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)
D All of the above
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in
A Raman spectra
B Absorption spectra
C Emission spectra
D Fluorescence
The green light only ever goes on when tank A is full and tank C isn't empty. The red light is always on unless either tank A isn't Full or tank B is empty. Given that the green light is on, we can conclude all of the following EXCEPT---
A Tank A cannot be empty
B The red light must be on
C Tank C cannot be empty
D we don't have enough information to determine whether tank B is empty or not
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?
A 32%
B 40%
C 48%
D 60%
Read the paragraph and answer the question-photosynthesis is a process in which radiant energy from sun is stored as chemical energy , which in turn is used to decompose carbon dioxide and water. The product of their decomposition are recombined into a new compound which successively builds, up into more and more complex organic substances like sugars, starches and cellulose that comprise the plant.The word stored in the paragraph is closest in morning to
A specified
B retained
C converted
D discovered
Evening sun is not a shot as the mid-day sun. What is the reason?
A In the evening, radiations travel slowly
B In the evening, the temperature of the sun decreases
C Ozone in atmosphere absorbs more light in the evening
D In the evening, radiations travel larger distance through atmosphere
What device converts light energy to electrical energy?
A Photodiode
B Photovoltaic cell
C Thermocouple
D Heliostats
A device that converts light energy to electrical energy is called a:
A thermocouple
B solar cell
C photodiode
D photo transistor
E None of the above
Which one of the following does not convert electrical energy into light energy?
A A candle
B A light emitting diode
C A laser
D A television set
Light : Sun :: Heat : ?
A Electricity
B Moon
C Fire
D Star

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