Which has the greater specific heat, a pint of water or a gallon of water? The greater heat capacity? Explain
Both have the same value of specific heat. The gallon of water has the greater heat
capacity. Heat capacity equals mass × specific heat. One gallon of water has more
mass than one pint of water.
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In the leftmost photo below, an instructor demonstrates that a standard two-by-four on a curved dish can be rotated by the attractive force of a charged rod. The two-by-four is affected by the charged rod of the same way as:
a. the metal ball in the figure 20-3. b. the insulating object in the figure at above right. c. neither of the two; a different mechanism is involved since the two-by-four is so massive.
A common belief is that everything that happens is predetermined by the predetermined mechanical motions of atoms, much as a clock operates. A good argument against this position is
A) Newtonian physics, on which this idea is based, cannot be conclusively proven to be true. B) many great scientists, such as Democritus, Kepler, and Newton, dispute this belief. C) science is not really relevant to our lives anyway. D) All of the above are good answers. E) Actually, there isn't any good answer to this position.
A baseball (1 kg) has an energy of 100 joules. If its uncertainty in position is 1 m, what is the percentage uncertainty (Dp/p × 10^0) in the momentum of the baseball?
a. <<1% b. 1% c. 2% d. 5% e. 10%
Discuss the discoveries of Galileo Galilei as reported in his bookSidereus Nuncius(The Starry Messenger)
What will be an ideal response?