Advertisements
Advertisements
प्रश्न
Round up the following upto three significant figures:
34.216
Advertisements
उत्तर
34.2
संबंधित प्रश्न
How many significant figures are present in the 5005?
How many significant figures are present in the 126,000?
Round up the following upto three significant figures:
10.4107
How many significant figures should be present in the answer of the following calculation?
0.0125 + 0.7864 + 0.0215
You are given a thread and a metre scale. How will you estimate the diameter of the thread?
Precise measurements of physical quantities are a need of science. For example, to ascertain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.
A man walking briskly in rain with speed v must slant his umbrella forward making an angle θ with the vertical. A student derives the following relation between θ and v: tan θ = v and checks that the relation has a correct limit: as v →0, θ → 0, as expected. (We are assuming there is no strong wind and that the rain falls vertically for a stationary man). Do you think this relation can be correct? If not, guess the correct relation.
State the number of significant figures in the following:
0.2370 g cm–3
State the number of significant figures in the following:
0.0006032 m2
Solve the numerical example.
Write down the number of significant figures in the following: 0.003 m2, 0.1250 gm cm-2, 6.4 x 106 m, 1.6 x 10-19 C, 9.1 x 10-31 kg.
The number of significant figures in 0.06900 is ______.
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give ______.
The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is ______.
Why do we have different units for the same physical quantity?
Which of the following measurements has exactly two significant figures?
What is the least count of a measuring instrument?
The radius of Earth is expressed as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude and number of significant figures?
