The cornea of the human eye is an example of a
A. converging mirror.
B. diverging lens.
C. converging lens.
D. convex mirror.
Answer: C
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What is the heat needed to heat 16.0 grams of helium gas at constant volume from 20.0 
to 85.0
?
A. 4.23 kJ B. 3.24 kJ C. 2.02 kJ D. 1.95 kJ E. 0.650 kJ
A neutrino is ______________
a. a photon of light b. a positively charged particle c. a subatomic particle d. a negatively charged particle
Projectile Motion: A projectile is fired from ground level at an angle above the horizontal on an airless planet where g = 10.0 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50.0 m/s respectively. How long after firing does it take before the projectile hits the level ground?
A. 5.00 seconds B. 10.0 seconds C. 15.0 seconds D. 20.0 seconds
A projectile is fired at an angle above the horizontal at a location where g = 9.8 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50 m/s respectively. At what angle was the projectile fired above the horizontal?
A) 45° B) 60° C) 30° D) 90° E) 75°