How many moles are there in 2.00 kg of copper? The atomic mass of copper is 63.5 g/mol and its density is 8.90 g/cm3
A) 15.3
B) 31.5
C) 51.3
D) 53.1
B
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Saturn’s many moons affect its rings through
A. tidal forces. B. orbital resonances. C. magnetic field interactions.
A composite beam is made up of a 200 mm 3 300 mm core (Ec 5 14 GPa) and an exterior cover sheet (300 mm 3 12 mm, Ee 5 100 GPa) on each side. Allowable stresses in core and exterior sheets are 9.5 MPa and 140 MPa, respectively. The ratio of the maximum permissible bending moment about the z axis to that about the y axis is most nearly:
(A) 0.5
(B) 0.7
(C) 1.2
(D) 1.5
Interstellar dust clouds are best observed at what wavelength?
A) visible only B) radio and infrared C) UV and infrared D) radio and X-ray E) visible and UV
During the period of one day, the number of high tides at a given location is about __________
Fill in the blank(s) with correct word