input with options: Answer the following question given this paragraph: Nuclear Fuels Nuclear fuel consists of a fissionable isotope, such as uranium-235, which must be present in sufficient quantity to provide a self-sustaining chain reaction. In the United States, uranium ores contain from 0.050.3% of the uranium oxide U3O8; the uranium in the ore is about 99.3% nonfissionable U-238 with only 0.7% fissionable U-235. Nuclear reactors require a fuel with a higher concentration of U-235 than is found in nature; it is normally enriched to have about 5% of uranium mass as U-235. At this concentration, it is not possible to achieve the supercritical mass necessary for a nuclear explosion. Uranium can be enriched by gaseous diffusion (the only method currently used in the US), using a gas centrifuge, or by laser separation. In the gaseous diffusion enrichment plant where U-235 fuel is prepared, UF6 (uranium hexafluoride) gas at low pressure moves through barriers that have holes just barely large enough for UF6 to pass through. The slightly lighter 235UF6 molecules diffuse through the barrier slightly faster than the heavier 238UF6 molecules. This process is repeated through hundreds of barriers, gradually increasing the concentration of 235UF6 to the level needed by the nuclear reactor. The basis for this process, Graham's law, is described in the chapter on gases. The enriched UF6 gas is collected, cooled until it solidifies, and then taken to a fabrication facility where it is made into fuel assemblies. Each fuel assembly consists of fuel rods that contain many thimble-sized, ceramic-encased, enriched uranium (usually UO2) fuel pellets. Modern nuclear reactors may contain as many as 10 million fuel pellets. The amount of energy in each of these pellets is equal to that in almost a ton of coal or 150 gallons of oil. Q: Uranium is an important part of the process used to harness which type of power? A:
OPTIONS:
- gravitational
- solar
- wind
- nuclear
output: nuclear

Q: Answer the following question given this paragraph: neutron : An uncharged particle with a mass nearly equal to that of the proton. Neutrons can be found in the nucleus of the atom. Q: What is the name of an uncharged particle whose weight is nearly equal to that of a proton? A:

OPTIONS:
- a nuclei
- proton
- electron
- a neutron

A: a neutron

input: OPTIONS:
- Permeation
- Diffusion
- Radiation
- heat Now, answer this question: Answer the following question given this paragraph: Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Q: What is the transfer of thermal energy between substances called? A:
A:
output: heat

Answer the following question given this paragraph: 17.6 | The Adrenal Glands By the end of this section, you will be able to: Describe the location and structure of the adrenal glands Identify the hormones produced by the adrenal cortex and adrenal medulla, and summarize their target cells and effects The adrenal glands are wedges of glandular and neuroendocrine tissue adhering to the top of the kidneys by a fibrous capsule (Figure 17.17). The adrenal glands have a rich blood supply and experience one of the highest rates of blood flow in the body. They are served by several arteries branching off the aorta, including the suprarenal and renal arteries. Blood flows to each adrenal gland at the adrenal cortex and then drains into the adrenal medulla. Adrenal hormones are released into the circulation via the left and right suprarenal veins. Q: What glands are wedges of glandular and neuroendocrine tissue adhering to the top of the kidneys by a fibrous capsule? A:

OPTIONS:
- heart glands
- nutrients glands
- fatty glands
- adrenal glands

Answer: adrenal glands

Problem: OPTIONS:
- hydro sphere
- heroclix sphere
- imipenem sphere
- volvox sphere
Q: Answer the following question given this paragraph: The Volvox sphere has a distinct front and back end. The colony of cells can swim in a coordinated fashion. The cells have eyespots, which are more developed in the cells near the front. This enables the colony to swim towards light. Q: What has a distinct front and back end? A:
Answer: volvox sphere

Answer the following question given this paragraph: Sulfur Oxygen Compounds The two common oxides of sulfur are sulfur dioxide, SO2, and sulfur trioxide, SO3. The odor of burning sulfur comes from sulfur dioxide. Sulfur dioxide, shown in Figure 18.47, occurs in volcanic gases and in the atmosphere near industrial plants that burn fuel containing sulfur compounds. Q: What sulfur compound occurs in volcanic gases and in the atmosphere near industrial plants? A:

OPTIONS:
- sulfur hydroxide
- carbon sulfide
- nitrogen sulfide
- sulfur dioxide

Answer:
sulfur dioxide