Chapter 1 Extra-Credit e-homework  with ANSWERS!


ANSWERS ARE GIVEN IN BOLD!

Start Date:     9 May 2008 at 03:00 PM
Due Date:     15 May 2008 at 01:00 AM
Student Access after Due Date:    Yes. View Only
Graded:    Yes

EOC Problem 1.14

In many countries, the energy content of food is listed in kilojoules (kJ), where 1 kJ = 1 x 103 J. Which is larger, one food Calorie or one kilojoule?

One kilojoule

One food Calorie

Test Bank, Question 1

If you have a toothache and the dentist taps your tooth to check for sensitivity, what part of the scientific method is being used?

experiment

theory

hypothesis

law

Test Bank, Question 3

All matter is composed of tiny, indivisible particles called atoms. All atoms are composed of protons, neutrons, and electrons. These statements are an example of a scientific _____.

theory

hypothesis

experiment

law

Test Bank, Question 4

Scientific laws differ from scientific theories in that _____.

laws explain phenomena and theories describe phenomena

laws describe phenomena and theories explain phenomena

theories eventually become laws

no difference exists. Laws and theories have the same meaning.

Test Bank, Question 5

Which two states of matter have a fixed volume?

gas and liquid

solid and liquid

no two states have a defined volume.

gas and solid

Test Bank, Question 7

Which of the following properties of sulfur is not a physical property?

yellow color

solid at room temperature

burns when ignited

density = 1.96 g/cm3

Test Bank, Question 15

Which is a physical change?

a piece of solid lead becoming fluid on a stove

red and blue food coloring forming a purple mixture when placed into a glass of water

a nail bending when hit off center by a hammer

All are physical changes.

Test Bank, Question 16

Which is a unit of measure of mass?

ºC

Joule

kilogram

liter

Test Bank, Question 17

Which of the following is a correct mathematical statement?

0.0005 = 5 x 104

0.0005 = 5-4

0.0005000 = 5 x 10-7

0.000005 = 5 x 10-6

Test Bank, Question 19

A mercury thermometer is used to take four temperatures of a solution. The temperatures are 44.8 ºC, 44.9 ºC, 45.0ºC, and 45.1ºC. An alcohol thermometer was also used and measured 44.9 ºC, 45.3 ºC, 45.4 ºC, and 45.9 ºC. The solution is correctly determined to be 45.0 ºC by other means.

The alcohol thermometer is the more precise.

There is no difference between the thermometers.

There is no way to determine precision with these temperatures.

The mercury thermometer is the more precise.

Test Bank, Question 20

Which pair is correct when considering the number of significant digits present?

3.000010; 6 significant digits (3.00001)

1.0100; 3 significant digits (1.01)

300.001; two significant digits (the 3 and the 1)

0.10100; 5 significant digits (.10100)

Test Bank, Question 21

Perform the following calculation: 39.5 x 22.0 x 0.0067. Round your answer to the correct number of significant digits.

5.822

5.82

5.8

5.8223

Test Bank, Question 23

A patient weighs 205 pounds, but the weight is to be recorded in kilograms. What is the patient's weight in kilograms using whole numbers? (Given: 1 kg = 2.205 lbs)

93 kg

100 kg

451 kg

205 kg

Test Bank, Question 24

Penicillin G, an antibiotic, is supplied in 1 mL volumes. Each mL contains 600,000 units of penicillin. This is a dose appropriate for a 150 pound person. What is the approximate number of units administered per kilogram body weight? (Given: 1kg = 2.205 lbs)

4,000 units/kg

40,000 units/kg

8,800 units/kg

270,000 units/kg

Test Bank, Question 25

The normal dosage for azinthromycin, an antibiotic, is 3.3 mg/kg. What is the proper dose for a 150 lb patient? (Given: 1kg = 2.205 lbs)

224 mg

300 mg

495 mg

100 mg

Test Bank, Question 28

The height of a 12 year old boy is 4 feet 9 inches. Record this height in centimeters. (Given: 1 in = 2.54 cm)

145 cm

33 cm

19.2 cm

122 cm

Test Bank, Question 33

A computer's specifications call for an operating temperature no higher than 125°F. State the temperature in terms of the Kelvin scale.

498K

325K

360K

398K

Test Bank, Question 37

A 150 lb adult burns 80 Calories/hour while sleeping. How many Calories are burned during an 8-hour night?

1200 Calories

640 Calories

160 Calories

1600 Calories

Test Bank, Question 38

What is the number of 1-1/2 teaspoon doses of a liquid medication in a 250 mL bottle? (Given 1 tsp = 5 mL)

250 doses

33 doses

167 doses

125 doses

Test Bank, Question 39

The instructions for a cough syrup are to give 2 teaspoons every 8 hours. The cough syrup is supplied in 150-mL bottles. How many bottles must be purchased to treat 3 children for 5 days? (Given 1 tsp = 5 mL).

1 bottle

2 bottles

3 bottles

4 bottles



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