Conservation of __________ is observed in strong and electromagnetic interactions, but not in weak interactions
Fill in the blank(s) with correct word
strangeness
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A star is crossing your meridian right now. When will it cross the meridian next?
A) very close to 23 hours, 56 minutes from now B) very close to 24 hours from now C) one year from now D) It depends on the star's position on the celestial sphere.
When a voltage difference is applied to a piece of metal wire, a 5.0-mA current flows through it
If this metal wire is now replaced with a silver wire having twice the diameter of the original wire, how much current will flow through the silver wire? The lengths of both wires are the same, and the voltage difference remains unchanged. (The resistivity of the original metal is 1.68 × 10-8 ? ? m, and the resistivity of silver is 1.59 × 10-8 ? ? m.) A) 21 mA B) 19 mA C) 11 mA D) 5.3 mA
You ride a motor scooter 8 km in 10 minutes. Your speed is
A) 24 km/hr. B) 40 km/hr. C) 16 km/hr. D) 32 km/hr. E) None of the above.
A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency?
A) 4f B) f/2 C) f/4 D) 2f E) f