At equilibrium on a bathroom weighting scale, the downward pull of gravity on you is balanced by
A) your weight.
B) an upward support force.
C) your mass.
Answer: B
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A wave disturbance in which the displacement in the medium is perpendicular to the direction of travel of the wave is a
A. longitudinal wave B. transverse wave
An object is placed at a distance of 40 cm from a thin, convex lens along its axis. The lens has a focal length of 10 cm. What are the values, respectively, of the image distance and magnification?
a. 13.3 cm and -0.33 c. 60 cm and 2.0 b. 13.3 cm and 0.33 d. 60 cm and -0.50
What does it mean for a physical quantity in a system to be conserved?
a. It is used in the most efficient manner possible. b. It stays in its original state forever. c. The total amount of it in the system stays constant. d. none of the above.
A unit of angular diameter could be meters
a. True b. False Indicate whether the statement is true or false