Riding down a river in an old canoe, if the discharge of the river does not increase and the river gets very wide and deep, the speed of the river will
A) decrease.
B) increase.
C) stay the same.
D) become unpredictable.
Answer: A
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A beam of X-rays at a certain wavelength are scattered from a free electron at rest and the scattered beam is observed at 45.0° to the incident beam. What is the Compton shift?
A) 1.75 × 10-13 m B) 2.76 × 10-13 m C) 0 m D) 3.56 × 10-13 m E) 7.11 × 10-13 m
The pupil of the eye controls:
A. the focal length of the eye B. the far point C. the near point D. the amount of light reaching the retina E. none of these.
Between the consumer and the power plant, most importantly, are
A) huge capacitors. B) generators. C) step-down transformers. D) all of the above E) none of the above
The five principles used to determine the relative ages of rock include original
A) horizontality, superposition, cross cutting, inclusion, and faunal succession. B) horizontality, nonconformity, cross cutting, inclusion, and faunal succession. C) inclusion, superposition, uniformitarianism, horizontality, and fossil succession. D) horizontality, uniformitariansism, cross cutting, stromatolite, and faunal succession.