input: OPTIONS:
- negative energy
- potential energy
- atmospheric energy
- thermal energy Now, answer this question: Answer the following question given this paragraph: A hot-water heating system uses thermal energy to heat water and then pumps the hot water throughout the building in a system of pipes and radiators. You can see a diagram of this type of heating system in Figure below . Typically, the water is heated in a boiler that burns natural gas or heating oil. There is usually a radiator in each room that gets warm when the hot water flows through it. The radiator transfers thermal energy to the air around it by conduction and radiation. The warm air then circulates throughout the room in convection currents. The hot water cools as it flows through the system and transfers its thermal energy. When it finally returns to the boiler, it is heated again and the cycle repeats. Q: A hot-water heating system uses what type of energy to heat water? A:
A:
output: thermal energy

Answer the following question given this paragraph: The nucleus contains the genetic material of the cell. Q: What organelle contains the genetic material of the cell? A:

OPTIONS:
- gamete
- fetus
- meiosis
- nucleus

Answer: nucleus

Problem: OPTIONS:
- elitism
- darwinian
- minimalism
- gradualism
Q: Answer the following question given this paragraph: When geologic and climatic conditions are changing, evolution may occur more quickly. Thus, long periods of little change may be interrupted by bursts of rapid change. This model of the timing of evolution is called punctuated equilibrium . It is better supported by the fossil record than is gradualism. Q: Fossil records support the idea that periods of little change may be interrupted by bursts of rapid change, an evolutionary model contrasted by what? A:
Answer: gradualism

Problem:OPTIONS:
- acceleration and speed
- work and speed
- volume and speed
- mass and speed

Answer the following question given this paragraph: Momentum is a vector that points in the direction of the velocity vector. The magnitude of this vector is the product of mass and speed. Q: The magnitude of the momentum vector is the product of what two properties? A:
****
A: mass and speed

Answer the following question given this paragraph: Disproportion is a type of redox reaction in which the same substance is both oxidized and reduced. Identify the element that is disproportionating and indicate the initial and final oxidation numbers of that element. 2CuCl(aq) CuCl2(aq) + Cu(s) Saylor URL: http://www. saylor. org/books. Q: What term describes a type of redox reaction in which the same substance is both oxidized and reduced? A:
OPTIONS:
- interposition
- disapprobation
- misappropriation
- disproportion
disproportion

Answer the following question given this paragraph: A headache is a very common nervous system problem. Headaches may be a symptom of serious diseases, but they are more commonly due to muscle tension. A tension headache occurs when muscles in the shoulders, neck, and head become too tense. This often happens when people are "stressed out. " Just trying to relax may help relieve this type of headache. Mild pain relievers such as ibuprofen may also help. Q: What common ailment is typically caused by tense muscles in the shoulders, head and neck? A:
OPTIONS:
- disturbances
- fever
- pollution
- headache

Answer:
headache