How many grams of deuterium (atomic mass = 2.0141 u) must be fused to helium (atomic mass 4.0026 u) in one second to produce 3000 MJ of energy? [1 u = 1.66 × 10^?27 kg]
0.005 2 grams
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A long thin rod of length L has a linear density ?(x) = Ax where x is the distance from the left end of the rod
(a) How far is the center of mass of the rod from the left end of the rod? (b) What is the mass of the rod?
The Oort cloud is filled with stony-iron meteorites
Indicate whether the statement is true or false
A 44.0-g block of ice at -15.0°C is dropped into a calorimeter (of negligible heat capacity) containing 100g of water at 5.0°C
When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 2.1 g B) 21 g C) 5.2 g D) 52 g E) 4.4 g
In the process of planetary formation, when would the inward migration of Jupiters have been most likely?
A) Shortly after all of the planets had finished forming B) Just after the system was cleared of the remaining gas C) Before these planets had grown to full size D) After these planets had reached full size, but before terrestrial planets had finished forming E) At least hundreds of millions of years after planetary formation ended