Question: Answer the following question given this paragraph: 22.3 Magnetic Fields and Magnetic Field Lines Einstein is said to have been fascinated by a compass as a child, perhaps musing on how the needle felt a force without direct physical contact. His ability to think deeply and clearly about action at a distance, particularly for gravitational, electric, and magnetic forces, later enabled him to create his revolutionary theory of relativity. Since magnetic forces act at a distance, we define a magnetic field to represent magnetic forces. The pictorial representation of magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. As shown in Figure 22.15, the direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points. The magnetic field is traditionally called the Bfield. Q: What is the magnetic field traditionally referred to as? A:
OPTIONS:
- m-field
- charged field
- spicule
- bfield
Answer: bfield

input with options: Answer the following question given this paragraph: What happens when forces of evolution work over a long period of time? The answer is macroevolution. An example is the evolution of a new species. Q: What happens when forces of evolution work over a long period of time? A:
OPTIONS:
- substantial evolution
- Microevolution
- developmental evolution
- macroevolution
output: macroevolution

Q: Answer the following question given this paragraph: Photography by Kat. Ferns are common in the understory of the tropical rainforest . CC BY 2.0. Q: In a tropical rainforest, where are ferns common? A:

OPTIONS:
- forrest floor
- emergent
- canopy
- understory

A: understory

input: OPTIONS:
- gravitational
- solar
- wind
- nuclear Now, answer this question: 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:
A:
output: nuclear

Answer the following question given this paragraph: The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron. The messages carried by neurons are called nerve impulses. Q: A nerve cell that carries messages is called a? A:

OPTIONS:
- mitochondria
- stem cell
- platelet
- neuron

Answer: neuron

Q: Answer the following question given this paragraph: Q: Are birds and mammals mainly exothermic or endothermic? A:

OPTIONS:
- autotrophic
- hypothermic
- exothermic
- endothermic

A:
endothermic