Answer the following question given this paragraph: 12.4 Viscosity and Laminar Flow; Poiseuille's Law Laminar Flow and Viscosity When you pour yourself a glass of juice, the liquid flows freely and quickly. But when you pour syrup on your pancakes, that liquid flows slowly and sticks to the pitcher. The difference is fluid friction, both within the fluid itself and between the fluid and its surroundings. We call this property of fluids viscosity. Juice has low viscosity, whereas syrup has high viscosity. In the previous sections we have considered ideal fluids with little or no viscosity. In this section, we will investigate what factors, including viscosity, affect the rate of fluid flow. The precise definition of viscosity is based on laminar, or nonturbulent, flow. Before we can define viscosity, then, we need to define laminar flow and turbulent flow. Figure 12.10 shows both types of flow. Laminar flow is characterized by the smooth flow of the fluid in layers that do not mix. Turbulent flow, or turbulence, is characterized by eddies and swirls that mix layers of fluid together. Q: What term refers to the friction of fluid, within itself and its surroundings? Choices: - elasticity - volume - salinity - viscosity A:
viscosity
Answer the following question given this paragraph: Protozoa that cause giardiasis are spread by contaminated food or water. They live inside the intestine. They may cause abdominal pain, fever, and diarrhea. Q: How are protozoa that cause giardiasis spread? Choices: - insects - starch and water - lakes and rivers - food and water A:
food and water
Q: Answer the following question given this paragraph: Stars are classified by color and temperature. The most common system uses the letters O (blue), B (blue-white), A (white), F (yellow-white), G (yellow), K (orange), and M (red), from hottest to coolest. Q: What celestial bodies are classified by color and temperature, ranging from blue to red and hottest to coolest? Choices: - astroids - planets - galaxies - stars A:
A: stars
Question: Answer the following question given this paragraph: The Universe contains about a hundred billion galaxies. Q: Approximately how many galaxies are there in the universe? Choices: - an infinite number - a trillion - an octillion - about a hundred billion A:
Answer: about a hundred billion
*Question*
Answer the following question given this paragraph: Burning of fossil fuels, such as oil, releases carbon into the atmosphere. This carbon must be cycled - removed from the atmosphere - back into living organisms, or it stays in the atmosphere. Increased carbon in the atmosphere contributes to the greenhouse effect on Earth. Q: The greenhouse effect on earth is caused by an increase in what in the atmosphere? Choices: - phosphorous - vapor - satellites - carbon A:
**Answer**
carbon
(Q).
Answer the following question given this paragraph: Smooth muscle is found in the walls of other internal organs such as the stomach. It isn't striated because its muscle fibers are arranged in sheets rather than bundles. Contractions of smooth muscle are involuntary. When smooth muscles in the stomach contract, they squeeze food inside the stomach. This helps break the food into smaller pieces. Q: What type of muscle is found in the walls of other internal organs such as the stomach? Choices: - Fiber Muscle - inorganic muscle - Tube Muscle - smooth muscle A:
(A).
smooth muscle