Momentum is conserved only when there is no friction
Indicate whether the statement is true or false
F
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Why do today's high tides arrive about an hour later than yesterday's tides?
A. The tidal bulges include dry land as well as water, and dry land responds to the tidal forces more slowly. B. The gravitational pull of the Sun on the tidal bulges slows their flow around Earth. C. Friction between the surface of Earth and the water slow the water's motion. D. The Moon rises and sets about an hour later every day, and the tides follow the Moon.
A one ohm, a two ohm, and a three ohm resistor are connected in parallel in an electric circuit: The resistor dissipating the most power will be the ________ ohm resistor.
Fill in the blank(s) with the appropriate word(s).
A sphere is constructed of two concentric pieces. The inner part is a solid sphere of radius 10.0 cm made of a material with density 4000 kg/m3. The outer part is a spherical shell with inner radius 10.0 cm and outer radius 20.0 cm
The outer shell has a density 9000 kg/m3. (a) What is the mass of this sphere? (b) What is the average density of this sphere?
Two chemical structures are shown, one of a typical gasoline molecule and the other of a typical motor oil molecule. Which is which?
Base your reasoning not on memorization but rather upon what you know about molecular interactions and the various physical properties of gasoline and motor oil. A) Structure A represents the gas molecule because there are more bonds to gain energy from, giving it a higher energy content than oil. B) Structure A represents motor oil, illustrating a molecule with greater induced dipole-induced dipole molecular interactions thus, the molecules are strongly attracted to one another. C) Structure B represents the oil molecule. Because oil molecules are smaller, they can compact closer together, giving the appearance of a thicker solution than gasoline. D) Structure B represents crude oil which is processed to generate longer molecules of gasoline to prevent toxic vapors from harming consumers.