When properly used, a hydraulic press, like a wheel and axle, is capable of multiplying force input
A) A true statement.
B) A false statement.
C) Yes, and in special cases, energy as well.
Answer: A
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Mars has larger volcanoes than Earth's Hawaii
Indicate whether the statement is true or false
The room-temperature electrical conductivity of pure silver is 6.8×107 (?·m)-1 , and for pure copper the electrical conductivity is 6.0×107 (?·m)-1 . An alloy is made of 40 vol % copper and 60 vol % silver. Copper and silver form a eutectic phase diagram, with no solubility of copper in silver or of silver in copper at room temperature. Predict the room-temperature electrical resistivity of an alloy made from these materials.
What will be an ideal response?
Anerobic digestion for biomass production takes place under conditions of
a. no oxygen b. high temperatures c. strong acidity for dissolving waste
Earth's atmosphere is similar to the panes of glass in a greenhouse, it allows the Sun's
A) short-wavelength radiation to enter, but blocks long-wavelength terrestrial radiation from leaving. B) infrared light radiation to enter, and prevents the short-wavelengths from leaving. C) ultraviolet light to enter, and prevents the infrared light from leaving. D) infrared light to enter, and blocks the visible terrestrial light from leaving.