Use the Gibbs phase rule
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A black hole is _____
a. an object so dense that light cannot escape its surface b. a neutron star that has exceeded the Chandrasekhar limit c. a theoretical model that has never been observed d. an observed object that is not well understood e. the result of a neutron star merger
Light having a wavelength in vacuum of 600 nm enters a liquid of refractive index 2.0. In this liquid, its wavelength will be
A) 1200 nm B) 600 nm C) 300 nm D) 150 nm E) None of the above choices are correct.
A pendulum clock has a pendulum shaft made of aluminum which has a coefficient of linear expansion of 24.0 × 10-6 K-1. At 22°C the period of swing of the pendulum is 1.00 s
If the temperature is reduced to 5°C, how much time does the clock gain or lose in one day? A) It gains 18 s per day. B) It loses 18 s per day. C) It gains 9.0 s per day. D) It loses 9.0 s per day. E) It neither gains nor loses time.
Sand dunes form as wind
A) disperses sand. B) blows sand from the back to the front of the dune. C) blows sand from the front to the back of the dune. D) interrupts the normal sequence of deposition.