Physics Review 1 [Significant Digits and Problem Solving]

Significant Digits:

1. Significant digits are used to:

2. Identify the number of significant digits in the following numbers:

a. 250 mL f. 3000 Lb. 0.0085g g. 1.000 lbs.c. 314.05kg h. 100001 lbs.d. 31.00100kg i. 11005500 ge. 4.50 x 107m j. pH of 7.0

3. Significant Digits in operations, adding and subtracting:

Rule: _____________________________________________________________________

a. 350g + 1155 gb.

15.25 L + 35.875 L – 16.5 L

c. 1.525 x 106m + 6.25 x 105md.

157.25 cm – 60 cm

4. Significant Digits in operations, multiplying and dividing:

Rule: _____________________________________________________________________

a. 150 m ÷ 30 sb.

0.00015 s x 25000 N

c. 3.14159 x 6.5 md.

π x 6.5 m

5. Why are significant digits important for accuracy? Give a relevant example in your life.

1 Physics Review

Physics Review 1 [Significant Digits and Problem Solving]

Problem Solving in Science:

1. List the four key steps necessary to communicate your understanding and ideas in a solution. What ideas would you put in them?

a.

b.

c.

d.

2. In your opinion, and words, why is it important to show work when solving a problem? Explain and give relevant examples.

2 Physics Review