Chapter 2

 

Chapter 2 ques.35, 37, 38, 18, 14, 15, 16, 26, 27, 30

 

35.

Highest gravity-water

 

Lowest gravity-ice

 

37. .772c

 

38.heat capacity, and specific heat

 

 

18.

 143 g 3

0.074 cm 2

8.750 x 10-2 ng 4

1.072 km 4

10 800 cal 3

5.00 dm3 3

 

14.

A flame is hot qualitative

A candle weighs 90g quantitative

Wax if soft qualitative

A candle height decreases 4.2 cm per hr. quantitative

 

15. Accuracy is how close a measurement comes to the actual dimension or true value of what ever is measured. Precision is concerned with the reproducibility of what ever is measured.

 

 

16.

99 of 100 shots are made, good precision

99 of 100 shots hit the front of the rim and bounce off, poor precision and accuracy

33 of 100 shots are made; the rest miss, poor accuracy

 

26.

Time s

Length m

Temperature K

Mass kg

 

27.

Mili m: 1000 times smaller than the unit it precedes

Nano n: 1000 million times smaller than the unit it proceeds 1/1 000 000 000 or 10-9

Deci d: 10 times smaller than the unit it precedes

Centi c: 100 times smaller than the unit it precedes

 

30. Because mass is not weight it is a force. It is a measure of the pull on a given mass by the earth’s gravity.

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