A 3.0-kg block slides on a frictionless 20° inclined plane. A force of 16 N acting parallel to the incline and up the incline is applied to the block. What is the acceleration of the block?
a. 2.0 m/s2 down the incline
b. 5.3 m/s2 up the incline
c. 2.0 m/s2 up the incline
d. 3.9 m/s2 down the incline
e. 3.9 m/s2 up the incline
c
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Fill in the blank(s) with the appropriate word(s).
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What will be an ideal response?
Which of the following optical elements used alone can produce a real image of an object?
A. Negative lens B. Plane mirror C. Convex mirror D. Concave mirror E. Prism
Graphs of the first four standing waves in a closed organ pipe are shown in this figure. If the organ pipe were closed at both ends, how would the pattern of harmonics differ from the situation depicted in the figure?
a. All the harmonics occur when the organ pipe is closed at both ends. b. The same occurs as shown in the figure, i.e., the even harmonics are missing. c. The same occurs as shown in the figure, i.e., the odd harmonics are missing.