A measurement of an electron's speed is 2.0 × 106 m/s and has an uncertainty of 10%. What is the minimum uncertainty in its position? ( h = 1.055 × 10-34 J • s, mel = 9.11 × 10-31 kg)
A) 0.29 nm B) 0.15 nm C) 0.44 nm D) 0.60 nm E) 0.80 nm
A
Physics & Space Science
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A) photons. B) electrons. C) positrons. D) all of the above E) none of the above
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What three factors affect porosity?
What will be an ideal response?
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In the equation E = hf, the symbol f stands for
A) wave frequency. B) wavelength. C) rate at which photons are emitted. D) none of the above
Physics & Space Science
How fast would a rocket have to move past a ground observer if the latter were to observe a 3.0% length shrinkage in the rocket length? (c = 3.00 × 10^8 m/s)
a. 1.2 × 10^8 m/s c. 0.73 × 10^8 m/s b. 0.60 × 10^8 m/s d. 0.12 × 10^8 m/s
Physics & Space Science