A nearsighted person cannot see objects clearly beyond 50 cm (the far point). If the patient has no astigmatism and contact lenses are prescribed, what is the power of the lens required to correct the patient's vision?
a. -2.0 diopters
c. -4.0 diopters
b. -3.3 diopters
d. -5.0 diopters
A
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The New Horizons probe carries what kind of physical time capsule?
A) a small engraved plaque B) a gold-plated record containing pictures, multilingual greetings and music C) a DVD containing pictures D) this probe does not carry a physical time capsule but a message will eventually be uploaded to its computers
While the gondola is rising at a speed of 5.0 m/s, a passenger in a balloon-supported gondola throws a small ball up at a speed of 2.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
a. 2.0 m/s, up. b. 2.8 m/s, down. c. 3.0 m/s, up. d. 5.0 m/s, up. e. 7.0 m/s, up.
The period of oscillation for a signal having a frequency of 60 Hz is 60 seconds
a. True b. False Indicate whether the statement is true or false
For the wall of Example 2-11, determine the heat transfer in the y-direction at 3 feet above the base.
What will be an ideal response?