A lens of focal length 20 cm has an object of height 3.0 cm placed 100 cm in front of it. The image formed is
A)
upright and smaller than the object.
B)
inverted and smaller than the object.
C)
inverted and larger than the object.
D)
upright and larger than the object.
E)
upright and the same size as the object.
B
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A wave is traveling in a string at 50 m/s. When the tension is then increased 18%, what will be the resulting wave speed?
a. also 50 m/s b. 54 m/s c. 45 m/s d. 21 m/s e. 59 m/s
A combination of colors adjacent to each other on the color wheel creates a significant amount of contrast.
Answer the following statement true (T) or false (F)
A car starts from rest and accelerates with a constant acceleration of 1.00 m/s2 for 3.00 s. The car continues for 5.00 s at constant velocity. How far has the car traveled from its starting point?
A) 24.0 m B) 9.00 m C) 19.5 m D) 4.50 m E) 15.0 m
When a crate of mass m is dragged a distance d along a surface with coefficient of kinetic friction ?k, then dragged back along the same path to its original position, the work done by friction is
a. 0. b. ??kmgd. c. +?kmgd. d. ?2?kmgd. e. +2?kmgd.