Matter Waves: Calculate the kinetic energy, in electron-volts, of a neutron that has a de Broglie wavelength of 7.2 × 10-12 m (mneutron = 1.675 × 10-27 kg, 1 eV = 1.6 × 10-19 J, h = 6.626 × 10-34 J ? s)
Fill in the blank(s) with the appropriate word(s).
16 eV
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When properly used, a hydraulic press, like a wheel and axle, is capable of multiplying force input
A) A true statement. B) A false statement. C) Yes, and in special cases, energy as well.
A concave mirror has radius R. When an object is located a distance 2R from the lens, which describes the image formed?
a. real, inverted, diminished b. real, inverted, enlarged c. virtual, upright, diminished d. real, inverted, of equal size
A bird, accelerating from rest at a constant rate, experiences a displacement of 37 m in 11 s. What is the final velocity after 11 s?
a. 6.7 m/s c. 13 m/s b. 5.1 m/s d. zero
A common opinion concerning the creationism versus evolution controversy is the idea that Earth was created fairly recently but that it was created with fossils and other evidence of great age already present, so that Earth has the appearance of
being very old even though it is really quite young. This opinion is best classified as A) a scientific hypothesis for which there is currently insufficient evidence. B) a scientific opinion that is probably incorrect. C) nonscientific because it contradicts common sense. D) nonscientific because there is no conceivable scientific way to disprove it. E) a scientific opinion that is certainly incorrect.