In the Big Bang, about 75% of the normal matter by mass was hydrogen atoms, and the other 25% almost entirely helium
Indicate whether the statement is true or false
TRUE
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The ____________________ contains a large amount of gas and dust and a great number of stars, and our Sun is one of those stars
Fill in the blank(s) with correct word
What is the focal length of a magnifying glass that produces an angular magnification of 7.0 x when used by a person with a near point at 28 cm?
A) 2.0 cm B) 3.0 cm C) 4.0 cm D) 5.0 cm E) 6.0 cm
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
What is the power factor of an RLC series circuit with an inductive reactance of 174 ?, a capacitive reactance of 60 ? and a resistance of 100 ??
A) 0.29 B) 0.46 C) 0.56 D) 0.66 E) 0.76