The uncertainty principle was formulated by
A. Einstein.
B. Bohr.
C. Heisenberg.
D. Planck.
E. Dirac.
C. Heisenberg.
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Heat Engines: A heat engine performs the reversible cycle abca with 9.0 moles of an ideal gas, as shown in the pV diagram in the figure. Path ca is an adiabatic process for which the adiabatic constant of the gas is 1.60. The temperature at point a is 300 K and at point b it is 500 K, and the volume at point c is 0.20 m3. (R = 8.31 J/mol ? K)(a) How much heat is absorbed by the gas in segment ab?(b) How much heat is absorbed by the gas in segment ca?
Fill in the blank(s) with the appropriate word(s).
If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's rotation period and axis tilt were unchanged, then
A) stars would take twice as long to rise and set. B) the cycle of precession would take 13,000 years instead of 26,000 years. C) the four seasons would each be twice as long as they are now. D) the Earth would not have seasons.
Newly-formed neutron stars start with weak magnetic fields, but they strengthen over time into pulsars
Indicate whether the statement is true or false
The cosmic background radiation appears compatible with a blackbody source at what temperature?
a. 0.0003 K c. 300 K b. 3 K d. 0.03 K