Displacement: An object moves 15.0 m north and then 11.0 m south. Find both the distance it has traveled and the magnitude of its displacement.
A. 4.0 m, 26.0 m
B. 26.0 m, 4.0 m
C. 26.0 m, 26.0 m
D. 4.0 m, 4.0 m
Answer: B
Physics & Space Science
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A bat is flying toward a cave wall at 27.0 m/s. What is the frequency of the reflected sound that it hears, assuming it emits sound at 52.0 kHz? The speed of sound is 341.5 m/s.
A. 60.9 kHz B. 56.5 kHz C. 61.3 kHz D. 56.1 kHz
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An oxygen molecule falls in a vacuum. From what height must it fall so that its kinetic energy at the bottom equals the average energy of an oxygen molecule at 920 K?
A) 36,500 meters B) 12,100 meters C) 24,300 meters D) 48,700 meters
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Calculate (0.82 + 0.042) × (4.49 × 10^3), keeping only significant figures
a. 3870.8 c. 3879 b. 3870 d. 3900
Physics & Space Science
Optical fibers work because of __________
Fill in the blank(s) with correct word
Physics & Space Science