A 1000-kg object hangs from the lower end of a steel rod 5.0 m long that is suspended vertically. The diameter of the rod is 0.80 cm and Young's modulus for the rod is 210,000 MN/m2. What is the elongation of the rod due to this object?
A) 1.2 cm
B) 0.46 cm
C) 0.12 cm
D) 1.8 cm
E) 0.047 cm
B
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For a displacement standing wave in an air column in a pipe that is open at both ends, there must be at least:
a. one node and one antinode. c. two antinodes and one node. b. two nodes and one antinode. d. two nodes and two antinodes.
What are the most likely sources of the methane gas detected in the Martian atmosphere by the Mars Express orbiter and the Curiosity rover?
A) biological activity only B) biological or geological activity C) comet impacts only D) geological activity only
You are trying to cross a river that flows due south with a strong current. You start out in your motorboat on the east bank desiring to reach the west bank directly west from your starting point. You should head your motorboat
A) due west. B) due north. C) due south. D) in a southwesterly direction. E) in a northwesterly direction.
An electron determined to be at y = 2.000 ± 0.0010 cm has what minimum uncertainty in velocity?
What will be an ideal response?