The chief ingredient of most solar cells is
What will be an ideal response?
silicon
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LAHAR is another name for
a) pyroclastic flow b) volcanic mud flow c) avalanche d) lava flow e) volcanic landslide
Meteorological radar detects
A) the development of storms. B) precipitation amounts. C) wind movements. D) storm movements. E) all of the above
The latent heat of melting is 80 calories for 1 gram of ice. If 1 gram of ice absorbs 60 calories what do I get?
A) 1 gram of ice B) a mixture of ice and water at a temperature of 0°C C) 1 gram of water at a temperature of -20°C D) 1 gram of water at a temperature of 20°C E) a mixture of ice and water at a temperature of 20°C
Which of the following is the least efficient irrigation method?
A. gravity flow irrigation B. center pivot with low-pressure sprayer C. drip irrigation D. center pivot with LEPA sprinkler