Quantum theory was developed
A) almost in its entirety by Erwin Schroedinger.
B) almost in its entirety by Max Planck.
C) almost in its entirety by Albert Einstein.
D) by Planck, Schroedinger, Einstein, and many other scientists.
E) in its entirety by Planck, Schroedinger, and Einstein.
D
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Current: When a current flows through an ionic liquid such as salty water, the moving charges are
A. only protons. B. only electrons. C. only negative ions. D. only positive ions. E. both positive and negative ions.
A 5.00 kg ball is traveling at 4.0 m/s and strikes a wall. The ball bounces off the wall with a velocity of 4.0 m/s in the opposite direction. If the contact with the wall by the ball lasts for 0.10 seconds, then the magnitude of the impulse on the ball is
A. 24 kg m/s. B. 30 kg m/s. C. 36 kg m/s. D. 40 kg m/s. E. 50 kg m/s.
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is __________
Fill in the blank(s) with correct word
A fixed amount of ideal gas goes through a process abc. In state a, the temperature of the gas is 152°C, its pressure is 1.25 atm, and it occupies a volume of 0.250 m3
It then undergoes an isothermal expansion to state b that doubles its volume, followed by an isobaric compression back to its original volume at state c. (Hint: First show this process on a pV diagram.) The ideal gas constant is 8.314 J/mol ? K, and 1.00 atm = 1.01 × 105 Pa. (a) How many moles does this gas contain? (b) What is the change in the internal energy of the gas between states a and b? (c) What is the net work done on (or by) this gas during the entire process? (d) What is the temperature of the gas in state c?