The number of significant figures in 0.0160 kg is

Options

A. 2
B. 3
C. 4
D. 5

Answer

To determine the number of significant figures in the number 0.0160 kg, we can follow these steps:

### Step 1: Identify the Non-Zero Digits
In any number, all non-zero digits are considered significant.
- In 0.0160, the non-zero digit is '1' and '6'.

### Step 2: Count the Leading Zeros
Leading zeros (zeros before the first non-zero digit) are not significant.
- In 0.0160, the zeros before '1' (i.e., the two zeros) are leading zeros and do not count as significant figures.

### Step 3: Count the Trailing Zeros
Trailing zeros (zeros after the last non-zero digit) in a decimal number are significant.
- In 0.0160, the zero after '6' is a trailing zero and is significant.

### Step 4: Total Significant Figures
Now, we can count the significant figures:
- Non-zero digits: 1 (1) + 1 (6) = 2
- Trailing zero: 1 (0) = 1
- Total significant figures = 2 (from non-zero digits) + 1 (from trailing zero) = 3.

### Conclusion
The total number of significant figures in 0.0160 kg is **3**.