Significant Figures in Sum

Q. The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the masses of the pieces to correct significant figures

Q. What is the distance between 2 consecutive nodes and what is the distance between 2 consecutive antinodes and what is the distance between any 2 consecutive node and antinode

Q. The sum of the numbers $436.32,227.2$ and $0.301$ in appropriate significant figures is

1. $663.821$
2. $664$
3. $663.8$
4. $663.82$

Q. The mass of a box is $2.3\text{kg}$. Two marbles of mass equal to $2.15\text{kg}$ and $2.48\text{kg}$ are kept in it. The total mass of the box with correct significant figures is

1. $6.93\text{kg}$
2. $6.8\text{kg}$
3. $7\text{kg}$
4. $6.9\text{kg}$

Q. In an experiment, the percentage of error occured in the measurement of physical quantities $A,B,C$ and $D$ are $1\%,2\%,3\%$and $4\%$ respectively. Then, the maximum percentage of error in the measurement of $X$, where $X=\frac{A^2{B}^{1/2}}{C^{1/3}{D}^3},$ will be

1. $\left(\frac{3}{13}\right)\%$
2. $16\%$
3. $-10\%$
4. $10\%$

Q.

A vernier calipers is used for measuring lengths to an accuracy of:

1. 10^-3 m

2. 10^-1 m

3. 10^-2m

4. 10^-4 m

Q. The mass of a box is $2.3\text{kg}$. Two marbles of mass equal to $2.15\text{kg}$ and $2.48\text{kg}$ are kept in it. The total mass of the box with correct significant figures is

1. $6.93\text{kg}$
2. $6.8\text{kg}$
3. $7\text{kg}$
4. $6.9\text{kg}$

Q. All the zeroes to the right side of a digit are significant, if they come from a measurement. eg- 845000km have 6 S.F. Is there such a law for significant figures?

Q.

A metere scale is graduated at every mm. how many significant digits will be there in a length measurement with this scale?

Q.

The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the masses of the pieces to correct significant figures?

Q.

Add 3.1421 , 0.241 and 0.09 and give your answer with correct precision

1. 3.4

2. 3.4731

3. 3.47

4. 3.473