What is dispersion?
a. The reflection of colors off the surface of a bright-colored translucent object, like a jewel.
b. The refraction of light as it passes from air into water.
c. The separation of colors of light because their waves superpose.
d. The separation of light into different colors because of how different colors of light refract differently.
e. The combination of a spectrum of colored lights into white light.
d
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Two objects, a ring and a disk, both with equal mass and radii. Each is rotating about an axis through its center, as shown. Which has the greatest rotational inertia, I, a uniform disk or a ring?
A. They have the same I, since they both have the same mass and radius
B. The disk
C. The ring
A uniform rod (mass = 1.5 kg) is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a horizontal position. What is the angular speed of the rod when the rod makes an angle of 30° with the horizontal? (The rotational inertia of the rod about the pin is 2.0 kg?m2).
A. 2.2 rad/s B. 3.6 rad/s C. 2.7 rad/s D. 3.1 rad/s E. 1.8 rad/s
Two 4. ? resistors are connected in parallel, and this combination is connected in series with 3 ?. What is the effective resistance of this combination?
A) 11. ? B) 5. ? C) 7. ? D) 1.2 ? E) 4. ?
In organic molecules, a fluorine atom will normally form how many bonds?
a. 2 b. 3 c. 4 d. 1 e. 0