Resolution: A camera lens having a 50-mm focal length is set to f/4.0. What is the minimum spacing of two objects located 12 m from the lens if the objects are just barely resolved in the image using light of wavelength 500 nm?
A. 1.66 mm
B. 4.72 mm
C. 0.024 mm
D. 4.9 × 10-5 m
E. 0.59 mm
Answer: E
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Ekapluto is an unknown planet that has two moons in circular orbits. The table summarizes the hypothetical data about the moons
Mass Radius Orbital Radius Orbital period Moon A 4.0 × 1020 kg 2.0 × 108 m 4.0 × 106 s Moon B 1.5 × 1020 kg 2.0 × 105 m 3.0 × 108 m The orbital period of Moon B is closest to A) 5.6 × 106 s. B) 6.0 × 106 s. C) 6.4 × 106 s. D) 6.9 × 106 s. E) 7.3 × 106 s.
In a debate, is the statement "It's only a theory" a valid argument point against a theory (as in "The theory of evolution is wrong because it's only a theory")?
a. Yes, theories are weak. b. No, theories are strong. c. No, theories are weak. d. Yes, theories are meaningless.
Global climate change has been suggested as a reason for societal changes or collapses in several instances. Why should drought or other climate-induced change cause social change? Explain how this could possibly occur
What will be an ideal response?
What is the internal energy of 42 moles of Neon gas (molecular mass = 20 u) at 27°C? (R = 8.31 J/mol • K)
a. 1.9 × 10^5 J b. 1.6 × 10^5 J c. 3.8 × 10^3 J d. It depends on the container size, which is not given.