Which of the following extrasolar planets would be the most difficult to detect using the Doppler shift method?
A) a low mass planet far from its parent star
B) a massive planet close to its parent star
C) a low mass planet close to its parent star
D) a massive planet far from its parent star
A
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What holds the electron to the nucleus of an atom?
a. Coulomb force b. binding energy c. thermal energy d. heat
First Law of Thermodynamics: A compression, at a constant pressure of 140 kPa, is performed on 4.0 moles of an ideal monatomic gas for which CV = 3/2 R. The compression reduces the volume of the gas from 0.26 m3 to 0.12 m3. What is the change in the internal (thermal) energy of the gas during this process? (R = 8.31 J/mol ? K)
A. -29 kJ B. -49 kJ C. 29 kJ D. 49 kJ E. 0 kJ
The radiation source closest to us originates in
A) medical treatments. B) all kinds of power plants. C) our own bodies. D) none of the above
A jar holds 2.0 L of ideal nitrogen gas, N2, at STP. The atomic mass of nitrogen is 14.0 g/mol, the ideal gas constant is R = 8.31 J/mol ? K,
Avogadro's number is NA = 6.022 × 1023 molecules/mol, and 1.00 atm = 101 kPa. (a) How many moles of nitrogen are in the jar? (b) How many nitrogen molecules are in the jar? (c) What is the mass of the nitrogen in the jar?