input: OPTIONS:
- velocity
- frequency
- diameter
- density Now, answer this question: Answer the following question given this paragraph: Density is an expression of the mass of substance in terms of the volume occupied by the substance. Q: What expresses the mass of substance in terms of the volume occupied by the substance? A:
A:
output: density

Answer the following question given this paragraph: A binary molecular compound is a molecular compound that is composed of two elements. In general, the elements that combine to form binary molecular compounds are both nonmetals. This contrasts with ionic compounds, which usually involve bonds between metal ions and nonmetal ions. Because ionic charges cannot be used to name these compounds or to write their formulas, a different naming system must be used for molecular compounds. Another difference between ionic and molecular compounds is that two nonmetal atoms will frequently combine with one another in a variety of ratios. For example, nitrogen and oxygen combine to make several binary compounds, including NO, NO 2 , and N 2 O. Obviously they can't all be called nitrogen oxide! How would someone know which one you were talking about? Each of the three compounds has very different properties and reactivity. A system to distinguish between compounds such as these is necessary. Q: A binary molecular compound is a molecular compound that is composed of what? A:

OPTIONS:
- two atoms
- four atoms
- four elements
- two elements

Answer: two elements

Problem: OPTIONS:
- production and precision
- Aim and precision
- equilibrium and precision
- accuracy and precision
Q: Answer the following question given this paragraph: The distribution of darts on a dartboard shows the difference between accuracy and precision. Q: What does the distribution of darts on a dartboard shows the difference between? A:
Answer: accuracy and precision

Problem:OPTIONS:
- skeletal muscle
- controllable muscle
- smooth muscle
- cardiac muscle

Answer the following question given this paragraph: 30.5 Applications of Atomic Excitations and De-Excitations 30. Figure 30.39 shows the energy-level diagram for neon. (a) Verify that the energy of the photon emitted when neon goes from its metastable state to the one immediately below is equal to 1.96 eV. (b) Show that the wavelength of this radiation is 633 nm. (c) What wavelength is emitted when the neon makes a direct transition to its ground state? 31. A helium-neon laser is pumped by electric discharge. What wavelength electromagnetic radiation would be needed to pump it? See Figure 30.39 for energy-level information. Ruby lasers have chromium atoms doped in an aluminum oxide crystal. The energy level diagram for chromium in a ruby is shown in Figure 30.64. What wavelength is emitted by a ruby laser?. Q: A desmosome is a cell structure that anchors the ends of what fibers together? A:
****
A: cardiac muscle

Answer the following question given this paragraph: Comets carry materials in from the outer solar system. Comets may have brought water into the early Earth. Other substances could also have come from comets. Q: What is rusting an example of? A:
OPTIONS:
- radiation change
- Decomposition
- contamination change
- chemical change
chemical change

Answer the following question given this paragraph: Deposition also occurs when a stream or river empties into a large body of still water. In this case, a delta forms. A delta is shaped like a triangle. It spreads out into the body of water. An example is shown in Figure above . Q: What triangular feature is formed when a river empties into a large body of still water? A:
OPTIONS:
- flow
- confluence
- region
- delta

Answer:
delta