What is the hardness of fluorite on the Mohs scale?
a. 1
b. 4
c. 7
d. 10
b
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Based on current evidence concerning the amount of deuterium in the universe, we can conclude that
A) ordinary (baryonic) matter makes up most of the mass of the universe. B) neutrons greatly outnumber protons in the universe. C) most of the deuterium that was created during the era of nucleosynthesis has since been destroyed. D) the density of ordinary (baryonic) matter is between 1 percent and 10 percent of the critical density. E) we live in a critical-density universe.
A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The frequency of the electromagnetic oscillations in the circuit is
A. 5.73 × 10?4 Hz. B. 9.55 × 10?3 Hz. C. 0.442 Hz. D. 2.65 Hz. E. 44.0 Hz.
When 1.0 gram of hydrogen combines with 8.0 grams of oxygen, 9.0 grams of water is formed. But is this true? During the reaction 2.86 × 105 J of energy is released. How much mass is actually lost in this reaction?
What will be an ideal response?
A particle with __________ obeys the Pauli exclusion principle
Fill in the blank(s) with correct word