Which is true about comparing clocks in two different inertial systems?
a. There is no way to know the relation between clocks in the two systems.
b. Clocks in one system appear to run faster when viewed from the other.
c. Clocks in one system appear to run slower when viewed from the other.
d. Clocks in one system appear to run backwards when viewed from the other.
e. The clocks are all synchronized.
c
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When the principal quantum number of the
hydrogen electron is infinite, a) the electron has an orbit of 0.053 nm radius. b) the electron has a binding energy of +13.60 eV. c) the electron has a binding energy of -13.60 eV. d) the electron is no longer bound to the hydrogen nucleus at all.
What observations characterize solar maximum?
A) The Sun becomes much brighter. B) The Sun emits light of longer average wavelength. C) The Sun rotates faster at the equator. D) We see many sunspots on the surface of the Sun.
Buoyancy: A rectangular box of negligible mass measures 5.0 m long, 1.0 m wide, and 0.50 m high. How many kilograms of mass can be loaded onto the box before it sinks in a lake having water of density 1000 kg/m3?
A. 0.50 × 103 kg B. 1.5 × 103 kg C. 2.5 × 103 kg D. 3.5 × 103 kg
The rise in ocean levels is due to
A) warmer water. B) melting of ice on land that flows into the ocean. C) both of these D) none of the above