In modern physics, what is heat?
a. A change in energy marked by a change in temperature.
b. A change in temperature caused by a change in energy.
c. The flow of energy between objects due to a difference in their temperature.
d. The opposite of cold.
e. A change in work.
c
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Discuss a similarity and a difference between the spectrum formed by a diffraction grating (a large number of slits) and that formed by just a double slit
What will be an ideal response?
Sometimes the current in lamps is too feeble to produce glowing of the lamp filaments, which occurs when
A) too many lamps are connected in series. B) too many lamps are connected in parallel. C) too much current is drawn by the battery.
Matter waves were confirmed when it was found that electrons
a. diffract. b. have a plus or minus spin quantum number. c. possess a negative charge. d. have mass.
If two children sit on a seesaw and one is twice as heavy as the other, in order to achieve balance the lighter child must sit
A. half as far from the fulcrum B. twice as far from the fulcrum C. the same distance from the fulcrum D. four times as far from the fulcrum