# Significant Figures in Sum

## Trending Questions

**Q.**

Difference between communication address and permanent address?

**Q.**

The length of the string of a simple pendulum is measured with a metre scale to be 90.0 cm, The radius of the bob plus the length of the hook is calculated to be 2.13 cm using measurements with a slide callipers.

What is the effective length of the pendulum ? (The effective length is defined as the distance between the point of suspension and the centre of the bob.)

**Q.**How many astronomical units are there in 1 metre?

**Q.**A body of mass m=3.513 kg is moving along the x−axis with a speed of 5.00 ms–1. The magnitude of its momentum is recorded as

(Consider significant figures)

- 17.6 kg ms−1
- 17.565 kg ms−1
- 17.56 kg ms−1
- 17.57 kg ms−1

**Q.**

A bullet of mass of $0.01kg$ is fired from a gun weighing $5.0kg$. If the initial speed of the bullet is $250m{s}^{-1}$, calculate the speed with which the gun recoils.

$-0.5m/s$

$-0.25m/s$

$+0.5m/s$

$+0.25m/s$

**Q.**

Form the greatest and the smallest $3$ digit numbers using any three different digits with the condition that digit $6$ is always at the unit place.

**Q.**If the length of the pendulum in a pendulum clock increases by 0.1%, then the error in time per day is :

- 86.4 s
- 43.2 s
- 8.64 s
- 4.32 s

**Q.**

A metre scale is graduated at every millimetre. How many significant digits will be there in a limo measurement with this scale ?

**Q.**In a simple pendulum experiment for determination of acceleration due to gravity (g), time taken for 20 oscillations is measured by using a watch of 1 second least count. The mean value of time taken comes out to be 30 sec. The length of pendulum is measured by using a meter scale of least count 1 mm and the value obtained is 55.0 cm. The percentage error in the determination of g is close to,

- 0.2 %
- 3.5 %
- 6.8 %
- 0.7 %

**Q.**

A meter scale is graduated in

m and cm

m and mm

cm and mm

km and m

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

- 6.93 kg
- 6.8 kg
- 7 kg
- 6.9 kg

**Q.**The number of significant figures in 0.00600 are

- 4
- 3
- 2
- 1

**Q.**

Four identical planks each of length a are arranged one above the other over a table as shown. Each projects a distance beyond the edge of the one that is below it. Maximum value for L so that no block topples is

**Q.**

Show that if the room temperature changes by a small amount from T to T+ΔT, the fundamental frequency of an organ pipe changes from v to v+Δv, where Δvv=12ΔTT.

**Q.**Side of an equilateral triangle is measured as 3.6±.06 cm, find percentage error in area of triangle

- 4.2 %
- 2.8 %
- 1.7 %
- 3.4 %

**Q.**If the length of a simple pendulum is recorded as (90.0±0.02) cm and period as (1.9±0.02) s, the percentage of error in the measurement of acceleration due to gravity is

- 4.2%
- 2.1%
- 1.5%
- 2.8%

**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.**How many significant number are there in 0.0023040 ?

**Q.**Find center of mass of thin, uniform semicircular wirs of radius R

- Rπ
- 3Rπ
- 2Rπ
- 3R2π

**Q.**The sum of 436.32, 227.2 and 0.301 in appropriate significant figures is

- 663.821
- 664
- 663.8
- 663.82

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

- 6.93 kg
- 6.8 kg
- 7 kg
- 6.9 kg

**Q.**A body travels uniformly a distance of (13.8+0.2) m in a time (4.0+0.3)s. Find the velocity of the body within error limits and the percentage error?

**Q.**The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet inappropriate significant figures and error is:

- 163.62±3cm2
- 163.6±2.6cm2
- 163.62±2.6cm2
- 164±3cm2

**Q.**The number of significant figures in 500.06 is _________.

**Q.**Subtract 3.2×10−6 from 4.7×10−4 with due regard to significant figures.

- 4.7×10−4
- 7×10−4
- 5.7×10−4
- 4.7×10−5

**Q.**The least count of a stop-watch is (1/5) s. The time of 20 oscillations of a pendulum is measured to be 25 s. What is the maximum percentage error in this measurement ?

- 8%
- 4%
- 16%
- 1%

**Q.**Which of the following numbers has least number of significant figures?

- 0.80760
- 0.08076
- 80.267
- 0.80200

**Q.**

How do you define the significant figure of a measurement?

**Q.**A body of mass 20.00 g has volume 5.0cm3. The maximum possible error in the measurement of mass and volume respectively are 0.01 g and0.1cm3. The maximum percentage error in the density will be nearest to

- 1%
- 2%
- 25%
- 11%

**Q.**

Convert 150 kg mass into quintal?