Question

a technician recorded the air pressure from several pressure gauges. the table shows each air pressure reading in pascals (pa).
a pascal is a unit used to measure the amount of force applied on a given area by air or other gases.
a which pressure gauge showed the highest reading?
b which pressure gauge showed the lowest reading?
c the atmospheric pressure when these readings were made was 1.1·10^5 pascals. which gauge(s) showed a reading greater than the atmospheric pressure?

Explanation:

Step1: 统一单位

将\(210000\)转化为科学计数法\(2.1\times10^{5}\)，\(170000\)转化为科学计数法\(1.7\times10^{5}\)。

Step2: 比较大小

比较\(2.1\times10^{5}\)，\(5.2\times10^{5}\)，\(1.7\times10^{5}\)的大小。
因为\(1.7\times10^{5}<2.1\times10^{5}<5.2\times10^{5}\)。

Step3: 比较与大气压大小

已知大气压\(1.1\times10^{5}\)，比较\(2.1\times10^{5}\)，\(5.2\times10^{5}\)，\(1.7\times10^{5}\)与\(1.1\times10^{5}\)的大小。
因为\(1.1\times10^{5}<1.7\times10^{5}<2.1\times10^{5}<5.2\times10^{5}\)。

Answer:

a. \(B\)
b. \(C\)
c. \(A\)、\(B\)、\(C\)