Methane combustion is basically carbon combining with oxygen to form carbon dioxide. Why don't we represent the chemical equation for methane burning as C + O2 -> CO2?
What will be an ideal response?
We keep the hydrogens in order to keep track of what's happening overall in the
reaction. It could be important to know that water is being formed. If we are just interested
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Why can a rather small meteorite make such a big crater when it hits?
A. It is traveling so fast that it has a very large kinetic energy even with small mass. B. It is so hot from its passage through the air that it melts the surroundings. C. Air pressure on the leading side of the meteorite forms a shock wave that blows out the crater. D. Meteorites are much harder than the surface of the planet, and punch through it easily.
A spaceship traveling very fast relative to you fires a stream of photons at speed c away from you. You measure the photons' speed to be
A) less than c. B) more than c. C) equal to c.
Light being amplified by stimulated emission of radiation is the principle of the photoelectric effect
a. True b. False Indicate whether the statement is true or false
A galvanometer has a coil with a resistance of 24.0 ?. A current of 180 ?A causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for 10.0 A, what shunt resistor is required?
A) 123 ?? B) 234 ?? C) 342 ?? D) 432 ?? E) 423 ??