Two waves approach each other as shown. When they completely overlap, the resulting wave will look like
A. 
B. 
C. 
D. 
Answer: D
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Uncertainty Principle Using Momentum and Position: Suppose that the speed of an electron traveling 2.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.0010%). What is the least possible uncertainty within which we can determine the position of this electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 2.0 mm B. 5.8 mm C. 14 mm D. 14 cm E. 8.5 nm
Radio telescopes image a universe much ________ in temperature than with visible light
Fill in the blank(s) with correct word
The two most plentiful elements in the universe are
A) hydrogen and oxygen. B) nitrogen and helium. C) carbon and oxygen. D) lithium and helium. E) hydrogen and helium.
Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of
A) energy transfer. B) electric field. C) polarization. D) conduction.