Comparing the speed of sound in liquids, gases, and solids, the speed of sound is usually lowest in ____ and highest in ____
a. solids, liquids
b. gases, liquids
c. liquids, solids
d. gases, solids
d
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Pluto is no longer classified as a planet; instead it is classified as a(n) ____________________
Fill in the blank(s) with correct word
Exhibit 4-1While her kid brother is on a wooden horse at the edge of a merry-go-round, Sheila rides her bicycle parallel to its edge. The wooden horses have a tangential speed of 6 m/s. Sheila rides at 4 m/s. The radius of the merry-go-round is 8 m.Use this exhibit to answer the following question(s). Refer to Exhibit 4-1. At what time intervals does Sheila encounter her brother, if she rides opposite to the direction of rotation of the merry-go-round?
A. 5.03 s B. 8.37 s C. 12.6 s D. 25.1 s E. 50.2 s
A 20-?F capacitor charged to 2.0 kV and a 40-?F capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 20-?F capacitor after the two are so connected?
A. 53 mC B. 27 mC C. 40 mC D. 80 mC E. 39 mC
X-rays with a wavelength of 0.00100 nm are scattered at 130° by free electrons
What is the kinetic energy of each recoil electron? (1 eV = 1.60 × 10-19 J, melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 0.68 MeV B) 0.34 MeV C) 0.99 MeV D) 2.0 MeV E) 0.50 MeV