The luminosity of the Sun is a measure of:
A) the energy received by the Sun on Earth's surface.
B) the energy received by the Sun at the location of Earth.
C) the energy received by the Sun at any location in the solar system.
D) the energy emitted by the Sun at the photosphere.
E) the total energy emitted by the Sun in all directions.
E
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What does the C in CSS stand for?
A. creative B. cascading C. computer D. color
Polaroid sunglasses reduce much glare by polarization axes that are
A) vertical. B) horizontal. C) at right angles to each other.
The result of a particle meeting its antiparticle will most likely be
A. the creation of a "black hole." B. the release of quarks contained in each particle. C. the creation of a new particle with twice the mass of the original particles. D. annihilation of the two particles and the release of photons.
In an electrochemical cell, there is a tin electrode in a molar solution of Sn2+ ions and an iron electrode in a molar solution of Fe2+ ions.
(a) What reactions occur at the two electrodes? (b) What voltage is developed in the cell? (c) What is the Gibbs free energy change per mole of ions involved in the reaction?