An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV
Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. ( h = 1.055 × 10-34 J • s = 6.59 × 10-16 eV • s)
3.9 × 10-21 s
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A car travels counterclockwise around a flat circle of radius 0.25 km at a constant speed of 20 m/s. When the car is at point A as shown in the figure, what is the car's acceleration?
A. 1.6 m/s2, south B. Zero C. 1.6 m/s2, east D. 1.6 m/s2, north E. 1.6 m/s2, west
Mercury, Venus, and Earth have similar densities
Indicate whether the statement is true or false
A ray of light travels across a liquid-to-glass interface. If the indices of refraction for the liquid and glass are, respectively, 1.75 and 1.52, what is the critical angle at this interface?
a. 60.3° c. 52.2° b. 30.0° d. Critical angle does not exist.
SETI (the Search for Extraterrestrial Intelligence) searches for communications from life in planets and moons
A) around nearby stars. B) toward the center of the Milky Way. C) in globular clusters. D) in other galaxies. E) within the solar system.