A mass of 1000 kg hangs at the end of a steel rod 5.0 m in length. 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?
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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A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the L = 2 quantum state
What is its rotational energy in the L = 1 quantum state? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 3.4 × 10-6 eV B) 7.8 × 10-6 eV C) 5.3 × 10-6 eV D) 8.7 × 10-6 eV
Earth and Venus have more substantial atmospheres because they are larger and had more volcanic activity.
Answer the following statement true (T) or false (F)
A 12.6-V battery supplies a 2.0-A current for 2.0 minutes. What is the work done by the battery during this process?
a. 0 J c. 2.5 × 10^2 J b. 3.0 × 10^3 J d. 1.5 × 10^4 J
What causes the arcs and bubble shapes in the dust and gas distribution of the Orion Nebula?
A.) Previous generations of supernovae. B.) Photon pressure of newly formed stars. C.) Gravity waves from black holes. D.) Stellar wind from local stars. E.) Synchrotron radiation.