The Fascinating World of Water

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Questions and Answers

Which unit is commonly used to measure heat energy in physiology?

  • British Thermal Units (BTU)
  • Kilo Joules (kJ)
  • Joules (J)
  • Calories (Cal) (correct)

What is the conversion factor from calories to Joules?

  • Divide by 0.003968
  • Multiply by 4.186 (correct)
  • Multiply by 0.2388
  • Divide by 4.18

How many calories are equivalent to one BTU?

  • 0.003968 calories
  • 252.0 calories (correct)
  • 4.186 calories
  • 1055 calories

Which type of bond involves two atoms equally sharing electrons between them?

<p>Covalent bond (D)</p> Signup and view all the answers

Which type of bond involves sharing electrons between two atoms unequally?

<p>Polar covalent bond (A)</p> Signup and view all the answers

Which type of bond results from the electrostatic attraction between the positively charged nuclei of metal atoms and the electrons in the metal?

<p>Metallic bond (A)</p> Signup and view all the answers

Which state of matter has strong intermolecular forces that hold the constituents together and is virtually incompressible?

<p>Solid (C)</p> Signup and view all the answers

Which unit is used to measure volume in the metric system?

<p>Liter (L) (D)</p> Signup and view all the answers

What does density represent?

<p>The amount of the substance mass per unit of volume (A)</p> Signup and view all the answers

What is the relationship between the volume of gas in a cylinder and the internal volume of the cylinder?

<p>The volume of gas is equal to the internal volume of the cylinder (B)</p> Signup and view all the answers

What is the formula for calculating work in pulmonary physiology?

<p>Work = pressure × volume (A)</p> Signup and view all the answers

Which of the following best describes the relationship between theories and laws in science?

<p>Theories are explanations based on current evidence, while laws are universal generalizations based on long-term observations. (A)</p> Signup and view all the answers

What is the purpose of theories in scientific research?

<p>To provide a context for further research and prediction. (C)</p> Signup and view all the answers

What is the difference between scientific explanations and junk science?

<p>Scientific explanations adhere to the rules of evidence, while junk science does not. (C)</p> Signup and view all the answers

Which substance is unique in terms of its behavior when it gets colder?

<p>Water (A)</p> Signup and view all the answers

What happens to water molecules when they get warmer?

<p>They move further apart (D)</p> Signup and view all the answers

Why does ice float on water?

<p>Ice is less dense than water (B)</p> Signup and view all the answers

What is the work of breathing (WOB)?

<p>The amount of energy needed to overcome airway, lung, and chest wall resistances (A)</p> Signup and view all the answers

Which unit is most often used in clinical practice to measure density?

<p>Grams per cubic centimeter (D)</p> Signup and view all the answers

Which statement about the density of air is correct?

<p>Air density decreases with increasing temperature (B)</p> Signup and view all the answers

Which statement best describes specific gravity?

<p>Specific gravity compares the density of a substance to water (C)</p> Signup and view all the answers

What is the density of a substance if 6.54 milliliters of the substance weighs 89 grams?

<p>13.60 g/mL (B)</p> Signup and view all the answers

Which of the following statements is true about mass?

<p>Mass is a measure of an object's resistance to being moved. (C)</p> Signup and view all the answers

What is the formula for calculating weight?

<p>Weight = Mass x Gravitational Force (B)</p> Signup and view all the answers

Which of the following best describes density?

<p>Density is the ratio of an object's mass to its volume. (C)</p> Signup and view all the answers

Why does oil float on top of vinegar in a salad dressing?

<p>Oil is less dense than vinegar. (D)</p> Signup and view all the answers

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