The Fascinating World of Water

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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?

Covalent bond Signup and view all the answers

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

Polar covalent bond 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?

Metallic bond Signup and view all the answers

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

Solid Signup and view all the answers

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

Liter (L) Signup and view all the answers

What does density represent?

The amount of the substance mass per unit of volume 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?

The volume of gas is equal to the internal volume of the cylinder Signup and view all the answers

What is the formula for calculating work in pulmonary physiology?

Work = pressure × volume Signup and view all the answers

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

Theories are explanations based on current evidence, while laws are universal generalizations based on long-term observations. Signup and view all the answers

What is the purpose of theories in scientific research?

To provide a context for further research and prediction. Signup and view all the answers

What is the difference between scientific explanations and junk science?

Scientific explanations adhere to the rules of evidence, while junk science does not. Signup and view all the answers

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

Water Signup and view all the answers

What happens to water molecules when they get warmer?

They move further apart Signup and view all the answers

Why does ice float on water?

Ice is less dense than water Signup and view all the answers

What is the work of breathing (WOB)?

The amount of energy needed to overcome airway, lung, and chest wall resistances Signup and view all the answers

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

Grams per cubic centimeter Signup and view all the answers

Which statement about the density of air is correct?

Air density decreases with increasing temperature Signup and view all the answers

Which statement best describes specific gravity?

Specific gravity compares the density of a substance to water Signup and view all the answers

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

13.60 g/mL Signup and view all the answers

Which of the following statements is true about mass?

Mass is a measure of an object's resistance to being moved. Signup and view all the answers

What is the formula for calculating weight?

Weight = Mass x Gravitational Force Signup and view all the answers

Which of the following best describes density?

Density is the ratio of an object's mass to its volume. Signup and view all the answers

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

Oil is less dense than vinegar. Signup and view all the answers