How would the data be influenced by an increase of friction in the pulley?
All measured accelerations would have lower values.
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You are inside a jet plane moving at a constant velocity. You toss a rock straight up in the air, and then you keep your hand at the point of release. The rock comes down in your hand. This example illustrates
A) that light is a wave. B) the Michelson-Morley experiment. C) the principle of relativity. D) the principle of the constancy of lightspeed. E) that moving clocks go slow.
The Bohr theory does not predict that
a. hydrogen atoms will give off the lines from the Balmer series. b. the ground state of hydrogen is spherically symmetric. c. it requires 13.6 eV to ionize hydrogen. d. the approximate radius of a hydrogen atom is 5.3 × 10^?11 m.
Suppose that at a certain time a quanton has a well-defined position x = 0.15 nm. At that time, we perform an experiment to determine the quanton’s momentum, and find it has a value that corresponds to a de Broglie wavelength of 0.45 nm to a high degree of precision. What can we say about the quanton’s position after the experiment?
A. It is still 0.15 nm. B. It is now 0.45 nm. C. It is now within ±0.45 nm of 0.15 nm. D. It is now undefined but probably close to 0.15 nm. E. It is now completely undefined. F. Other (specify).
The greatest expansion of water among the following occurs when
A) it turns to ice. B) at 4°C it gains thermal energy. C) at 4°C it loses thermal energy. D) none of the above