Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Kinetic energy __________ conserved
Fill in the blank(s) with correct word
is not
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Electrons with a speed of 2.1 × 106 m/s are directed towards a 1.0-?m wide slit. An electron detector is placed 1.0 m behind the slit
How wide is the central maximum of the electron diffraction pattern on the detector? (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg) A) 690 ?m B) 350 ?m C) 1,000 ?m D) 1,400 ?m
A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)
a. 50 b. 60 c. 40 d. 70 e. 110
The ________ a period ________, that coincides with ________.
A. magnetic cycle is; of 22 years; a period of intense solar and earthquakes B. sunspot cycle is; of 11 years; the Sun's rotation around its axis C. Maunder Minimum is; of low sunspot activity; the "little ice age" in the late 17th century D. solar cycle is; of high sunspot activity; the cycle of the planetary alignments
If an electron has a measured wavelength of 0.832 × 10^?10 m, what is its kinetic energy? (h = 6.63 × 10^?34 J?s, 1 eV = 1.6 × 10^?19 J, and me = 9.11 × 10^?31 kg)
a. 7640 eV b. 418 eV c. 334 eV d. 218 eV e. 70 eV