MEASURING

Click on the correct answer



1 "A candle has a mass of 90 grams." This is what type of observation?
Statistical.
Quantitative.
Qualitative.
Numerical.

2 What is the definition of accuracy? Need Help?
The reproducibility of measured data.
How many times the measured value occurs in a sequence of numbers.
How closely the measured value is to a known or accepted value.
The closeness a measured value is to itself.

3 Comment on the accuracy and precision of a basketball player having 99 out of 100 shots hit the rim and bounce off. Need Help?
Inaccurate and precise.
Inaccurate and imprecise.
Accurate and precise.
Accurate and imprecise.

4 A student weighs a copper cylinder three times and records the following data: 47.95 g, 47.91 g, 47.89 g, 47.93 g. If the accepted weight for the cylinder is 47.32 g, describe the students accuracy and precision. Need Help?
Accurate and precise.
Accurate and imprecise.
Inacurate and precise.
Innacurate and imprecise.

5 How many significant figures are there in the measured value of 0.074 cm? Need Help?
5.
3
4
2

6 How many significant digits are there in the measured value of 1.072 km? Need Help?
4
3
2
1

7 Perform the following operations and report your answer to the correct number of significant figures: 8.7 g + 15.43 g + 19 g Need Help?
43.130
43.13
43.1
43 g

8 Perform the following operations and report your answer to the correct number of significant figures: 5.40 m x 3.21 m x 1.871 m Need Help?
32.4319
32.4
32.43
32.432

9 Perform the following operations and report your answer to the correct number of significant figures: (54.020 x 0.0770)/120 Need Help?
5.846
5.84
5.8
5

10 A shiny, gold-colored bar of metal weighing 57.318 g occupies a volume of 4.7 ml. Calculate the density and choose the answer with the correct number of significant figures
12. g/ml
12.19 g/ml
12.1953 g/ml
12.19532 g/ml