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 the position of the electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 0.58 nm B) 0.87 nm C) 1.5 nm D) 0.29 nm E) 4.9 nm
A
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A 20.0 cm wrench is used to generate a torque at a bolt. A force of 50 N is applied perpendicularly at the end of the wrench. The torque generated at the bolt is
A. 8.0 N•m. B. 10 N•m. C. 14 N•m. D. 22 N•m. E. 37 N•m.
The principal refraction of light by the eye occurs at the
A) cornea. B) lens. C) sclera. D) iris. E) retina.
The spherical distribution of the globular clusters in the Halo reminds us of the similar distribution of cometary nuclei in the ________ cloud
A) Hubble B) Kepler C) Kuiper D) Oort E) Shapley
How many constitutional isomers that are trifluoroethanes exist?
a. 3 b. 2 c. 4 d. 8 e. 5