Stwinnie 發問於 科學及數學數學 · 10 年前

# S1數學問題(31號前答)

Describe briefly how each of the following measurements can be taken and suggest a method to reduce the error involved.

a.the weight of a piece of tissue paper

b.the thickness of a cardboard

c.the diameter of a lamp post

a,b,c都要答=__=

### 2 個解答

• 匿名
10 年前
最愛解答

Describe briefly how each of the following measurements can be taken and suggest a method to reduce the error involved.

a.the weight of a piece of tissue paper

The weight of a piece of tissue paper is very small and variable. To minimize the error, we can take the weight of 50 pieces with an electronic scale first and then divide it by 50 to get the average weight of one piece.

b.the thickness of a cardboard

The easy and accurate way is to use a vernier caliper. Take the measurement at a number of positions and then average the total thickness measurements to get its thickness with reduced error.

c.the diameter of a lamp post

Measure the circumference of the lamp post at a number of positions with some non-stretch strings. Find the average circumference measurement from which the diameter is calculated with the formula diameter=circumference/丌

• 10 年前

b.the thickness of a cardboard