The photo on page 193 shows Lillian's hair standing out when her hand is on a charged Van de Graaff generator, which illustrates
A) strands of hair become charged and repel one another.
B) a high voltage is communicated to strands of hair.
C) strands of hair orient themselves in an electric field.
D) the effect of electrons and protons deposited on her hair.
Answer: A
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How many moles of air must escape from a 15.0-m × 9.0-m × 6.0-m room when the temperature is raised from 10.0°C to 20.0°C? Assume the pressure remains unchanged at one atmosphere while the room is heated. (R = 8.31 J/mol/K)
a. 4.9E+3 moles b. 1.2E+3 moles c. 2.2E+2 moles d. 7.9E+2 moles e. 5.0E+3 moles
A medium-mass star becomes a red giant as the result of _______________ fusion in a shell
Fill in the blank(s) with correct word
What is the kinetic energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
a. 0.65 eV b. 0.71 eV c. 0.84 eV d. 0.54 eV e. 1.4 eV
The mass of the black hole in the center of the galaxy has been determined by observing the motion of stars orbiting it
a. True b. False Indicate whether the statement is true or false