If you draw a spacetime diagram, how will the worldline of an object that is accelerating away from you appear?
A) vertical
B) horizontal
C) slanted
D) curved
E) a circle
D) curved
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What did Isaac Newton believe about the nature of light?
a. That light was a force. b. That light consisted of waves. c. That light was a stream of particles. d. That light was a fluid found in matter. e. Newton had no theories about light.
Compound Microscope: The distance between the object to be viewed and the eyepiece of a compound microscope is 25.0 cm. The focal length of its objective lens is 0.200 cm and the eyepiece has a focal length of 2.60 cm. What is the magnitude of the total magnification of the microscope when used by the person of normal eyesight if it is designed for minimum eyestrain?
A. 1070 B. 204 C. 520 D. 477 E. 772
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
A recent sunspot maximum occurred in 2001 . What is the year of the sunspot maximum that immediately follows the 2001 maximum if the solar cycle continues?
a. 2006 or 2007 b. 2012 c. 2018 d. 2023 e. the last cycle started a Maunder minimum and the next maximum cannot be predicted.