Who created the first reflecting telescope?
What will be an ideal response?
Isaac Nueton
Physics & Space Science
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Why modify the Grashof number for inclined surfaces?
What will be an ideal response?
Physics & Space Science
A nonrelativistic electron is accelerated from rest through a potential difference. After acceleration the electron has a de Broglie wavelength of 880 nm
What is the potential difference though which this electron was accelerated? (h = 6.626 × 10-34 J ? s, e = -1.60 × 10-19 C, mel = 9.11 × 10-31 kg) A) 1.9 µV B) 1.7 µV C) 2.2 µV D) 2.5 µV
Physics & Space Science
A ball is thrown vertically upward. At the top of its vertical path, its velocity is
A) 0 m/s. B) 10 m/s. C) between 0 m/s and 10 m/s. D) greater than 10 m/s. E) none of the above
Physics & Space Science
The last-quarter Moon rises approximately at
a. 6 A.M. b. noon. c. 6 P.M. d. midnight.
Physics & Space Science