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

Physics & Space Science

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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

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A neutrino is ______________

a. a photon of light b. a positively charged particle c. a subatomic particle d. a negatively charged particle

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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

Physics & Space Science

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°

Physics & Space Science