19) Which of the following measured volumes has the most uncertaingy 19 A) 10 mL

Question

19) Which of the following measured volumes has the most uncertaingy 19 A) 10 mL B) 10.0 mL C) 10.000 mL D) 10.00 mL E) All values have the same degree of uncertainty 20) Where is the uncertainty in the number 101.2 C A) in the tens place B) in the ones place C) in the tenths place D) in the hundredths place E) There is no uncertainty in this number 21) A flask contains 145.675 mL of a saline solution, If24.2 mL. of the saline solution are 21) withdrawn from the flask, how should the volume of the saline solution that remains the flask be reported? A) 121.5 mL B) 121 mL C) 121.475 mL D) 121.4 mL E) 122 mL 22)_ 22) Which physical property of an astronaut will change depending on whether he or she is on Earth or in orbit A) weight B) volume C) mass D) all would change E) none would change 23) 23) What is the basic unit of volume in the metric system? A) milliliter B) gram C) cubic centimeter D) millimeter E) liter 24) 24) Which statement concerming energy is FALSE? A) Kinetic energy is the energy associated with movement. B) Potential energy is stored energy due to composition or position. C) Heat, light, and electricity are different forms of energy. D) Energy is the amount of heat content in an object E) Conversion of energy from one form to another is possible

Explanation / Answer

19.

(A) Would have more uncertainity as it does not have any dicimal palces

20.

(C) It is in the tenths place. (the last digit 2)

21.

145.675 - 24.2 = 121.5

(A) Because answer of addition and substraction should have that many decimal places as one the numbers has least decimal places.

22.

(A)

23.

(E) L

24.

(D) is false

25.

(C) 100 0C is hotter

26.

4.18 J = 1 cal

44.3 kJ OR 44300 J of heat = 44300 / 4.18 cal = 10600 cal

(B)

27.

(B)

28.

(D) Potential energy

29.

(A)

30.

(B)

Density = mass / volume

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