A modern day device that does not need to have a computer chip built into it is
A. a cell phone.
B. a blood pressure meter.
C. a hand held calculator.
D. an MP3 player.
Answer: B
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The Almagest
a. is the book that first described the heliocentric solar system. b. is a collection of the science and mathematics of the Greeks. c. caused the author to be sentenced to house arrest. d. is a book of astrological myths and predictions produced by the Arabs. e. first described the Copernican theory.
If you hold your fist at arm's length, you will see it spanning an angle of about
A) 1 arcsecond. B) 1°. C) 10°. D) 45°. E) 90°.
A beam of electrons passing through a magnetic field experiences maximum deflection if the direction of the beam is
A) parallel to the field lines. B) perpendicular to the field lines. C) none of these
A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
A. +2.0 J B. +20 J C. ?2.0 J D. ?20 J E. +40 J