Wave energy can only be transmitted through a material medium
Indicate whether the statement is true or false
FALSE
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Lunar eclipses do not occur every full Moon, because the path of the ________ is tilted relative to the ________.
A. Sun; ecliptic B. Moon; ecliptic C. Earth; ecliptic D. Moon; equator
Which of the following alternatives to water has a wider temperature range over which it is a liquid?
A) ammonia B) methanol C) methane D) ethane
In the gas laws, the ______________ temperature scale must be used
Fill in the blank(s) with correct word
A 0.20-km wide river has a uniform flow speed of 3.0 m/s toward the east. A boat with a speed of 8.0 m/s relative to the water leaves the south bank and heads in such a way that it crosses to a point directly north of its departure point. How long does it take the boat to cross the river?
A. 29 s B. 23 s C. 25 s D. 27 s E. 17 s