The light reflected from a soap bubble (n = 1.40) appears red (? = 640 nm) at its center. What is the minimum thickness (in nm)?
a. 124
b. 104
c. 114
d. 134
e. 234
c
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When a shell of hydrogen accretes onto a white dwarf from a close companion, a(n) ________ explosion violently blows off a fraction of a solar mass
Fill in the blank(s) with correct word
A piece of iron sinks to the bottom of a lake where the pressure is 21 times what it is at the surface of the lake. Which statement best describes what happens to the volume of that piece of iron?
A) Its volume increases slightly. B) Its volume decreases slightly. C) There has been no change in the volume of the iron. D) Its volume becomes 1/21 what it was at the surface. E) Its volume becomes 21 times greater than at the surface.
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes 0.8 s for the wave to travel the 20 m to the opposite tower. If one meter of the rope has a mass of 0.35 kg, find the tension in the tightrope
An electron has a relativistic momentum of 1.1 × 10-21 kg ? m/s. What percent of its total energy is its kinetic energy? (melectron = 9.11 ×10-31 kg, c = 3.0 × 108 m/s)
What will be an ideal response?