When 1.0 gram of hydrogen combines with 8.0 grams of oxygen, 9.0 grams of water is formed. But is this true? During the reaction 2.86 × 10^5 J of energy is released. How much mass is actually lost in this reaction?
3.18 × 10^?12 kg
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Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination. What is the current through the battery if they are connected (a) in series or (b) in parallel?
What will be an ideal response?
Matter Waves: The spacing of the atoms of a crystal is 159 pm. A monoenergetic beam of neutrons directed normally at the surface of the crystal undergoes first order diffraction at an angle of 58° from the normal. What is the energy of each of the neutrons? (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 0.045 eV B. 0.039 eV C. 0.050 eV D. 0.056 eV E. 0.061 eV
Jet planes operate by
A) rocket drive [i.e., ejecting heated rocket fuel rapidly out the back end of the engine]. B) ejecting ions out the back end of the engine. C) sucking in air, heating it , and allowing it to expand out the back end of the engine. D) sucking in air and blowing it rapidly out the back of the engine by means of propeller blades inside the engine. E) magic.
__________ radiation is emitted from a small hole in a furnace
Fill in the blank(s) with correct word