round off each of the following quantities to three significant figures. 1.43cm³
Answers
Answer: this quantity cannot be round off because only quantities which have 5 or more than 5 no. then can be round of eg 16.58 than it will be 17.6
Answer: The given quantity 1.43 has three significant figures as all the digits are significant.
Explanation:
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
Rules for significant figures:
Digits from 1 to 9 are always significant and have infinite number of significant figures.
All non-zero numbers are always significant. For example: 654, 6.54 and 65.4 all have three significant figures.
All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.
All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.
All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.
The given quantity 1.43 has three significant figures as all the digits are significant.