A catapult is tested by Roman legionnaires. They tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): Range = 0.20 km; angle of launch = ?/4; landing height = launch height
What is the initial velocity of launch of the boulders if air resistance is negligible? A) 44 m/s
B) 1.4 m/s
C) 22 m/s
D) 0.69 m/s
A
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Which is the MOST important property of the element carbon that makes it ideal as a fundamental building block of biological molecules?
A) it is a very stable element B) it is the only element capable of bonding to itself C) it is a common element D) it readily forms chemical bonds with itself and other elements, allowing a wide variety of complex molecules to form
The surface temperature of Venus is 750 K, even hotter than Mercury
Indicate whether the statement is true or false
A temperature change from 35°C to 55°C corresponds to what incremental change in °F?
a. 20 b. 95 c. 36 d. 131 e. 68
Plate tectonics differs from continental drift because it
A) provides a credible driving force. B) did not explain the fit between South America and Africa. C) showed that ancient ice sheets did not exist. D) showed that Pangaea broke up much later than predicted.