What happens to a volume of water when its temperature is reduced from 8°C to 4°C?
a. density increases
c. density remains constant
b. density decreases
d. vaporizes
A
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According to the atomic materialist philosophy, certain things are regarded as "real" and other things as merely "imaginary." Which of the following is [or are] regarded by this philosophy as real?
A) human emotions B) directly observable phenomena such as color and warmth C) atoms D) Both answers A and B are correct. E) None of the above are regarded as real by the atomic materialist philosophy.
Lenz's Law: The wire in the figure carries a current I that is decreasing with time at a constant rate. The wire and the three loops are all in the same plane. What is true about the currents induced in each of the three loops shown?
A. No current is induced in any loop. B. The currents are counterclockwise in all three loops. C. The currents are clockwise in all three loops. D. Loop A has clockwise current, loop B has no induced current, and loop C has counterclockwise current. E. Loop A has counterclockwise current, loop B has no induced current, and loop C has clockwise current.
A light beam having a wavelength of 470 nm in air is directed into glycerine at an angle of 75.0° with the normal in air
Glycerine has a refractive index of 1.47. (c = 3.0 × 108 m/s) (a) What are the frequency and wavelength of the light in the glycerine? (b) What angle does the light beam make with the normal in the glycerine?
Consider a Carnot cycle starting at the state of highest pressure and smallest volume. Call the isothermal expansion that starts at this state step 1, the adiabatic expansion which follows step 2, the isothermal compression that then follows step 3, and the adiabatic compression which returns the system to the initial state step 4 . In which step does the entropy of the system increase?
a. 1 b. 2 c. 3 d. 4