In a polyethylene long-chain molecule, the carbon-carbon and hydrogen-carbon bonds are all ______________bonds.
Fill in the blank(s) with the appropriate word(s).
covalent
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In 1994, fragments of Comet P/Shoemaker-Levy 9 collided with Jupiter. Assume that these fragments came from an infinite distance away with zero initial speed and fell into Jupiter
What was their speed when they arrived at Jupiter's surface? Jupiter has a mass of 1.90 × 1027 kg and a radius of 71.4 × 106 m, and G = 6.67 x 10-11 N•m2/kg2. A) 10,400 m/s B) 11,200 m/s C) 35,500 m/s D) 42,100 m/s E) 59,600 m/s
A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus emits a gamma ray. What is the atomic number of the resulting nucleus after both processes?
A) Z - 3 B) Z + 1 C) Z - 2 D) Z - 1
Lens-Maker Formula: A thin double-convex lens is intended to focus the image of an object onto a screen so that the image is life-sized on the screen. The lens has equal-magnitude radii of 83 cm and a refractive index of 1.6. (a) What is the distance d from the image to the screen?(b) What is the total distance L between the object and the image?
A. (a) d = 138 cm (b) L = 276 cm B. (a) d = 276 cm (b) L = 552 cm C. (a) d = 69 cm (b) L = 35 cm D. (a) d = -138 cm (b) L = -276 cm
Center of Mass: Three small masses are positioned as follows: 2.0 kg at (0.0 m, 0.0 m), 2.0 kg at (2.0 m, 0.0 m), and 4.0 kg at (2.0 m, 1.0 m). Determine the coordinates of the center of mass (or center of gravity) of this system.
A. (0.50 m, 1.5 m) B. (1.5 m, 0.50 m) C. (2.5 m, 1.5 m) D. (2.5 m, 0.50 m)