A scientific hypothesis can be disproved with
A) one reproducible experiment.
B) disapproval of other scientists.
C) many tests by many scientists.
D) philosophical reasoning.
Answer: A
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Charge of uniform density 4.0 nC/m is distributed along the x axis from x = ?2.0 m to x = +3.0 m. What is the magnitude of the electric field at the point x = +5.0 m on the x axis?
A. 16 N/C B. 13 N/C C. 19 N/C D. 26 N/C E. 5.0 N/C
A person uses corrective glasses of power -8.5 D that are worn 2.0 cm from her eye
(a) Is she nearsighted or farsighted? (b) What is her far point without glasses? What will be an ideal response?
Magnetic fields are produced by
a. constant electric currents. b. electric currents that vary sinusoidally with time. c. time-varying electric fields. d. all of the above. e. only (a) and (b) above.
A pan of water boils on the stove.
C. Consistent D. Inconsistent