Tag: standard form

Question 1

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Which of the following is the smallest unit?

millimetre
angstrom
fermi
metre

Reveal answer Fill a bubble to check yourself

Answer

$1.25\times {{10}^{-10}}$

Answer

$\dfrac {9}{8}m$

Question 2

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Order of $\frac { 1 } { 8 \times 10 ^ { 9 } }$ is:

$1.77\times {{10}^{-10}}$
$1.55\times {{10}^{-10}}$
$1.95\times {{10}^{-10}}$

Reveal answer Fill a bubble to check yourself

Question 3

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

The resultant of two equal forces acting at right angles to each other is $1414$ dyne. Find the magnitude of either force.

$960$
$1000$
$1200$
$1414$

Reveal answer Fill a bubble to check yourself

Question 4

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

A particle is moving with a velocity $35\ m/s$ along positive x-axis.It's acceleration is towards negative X-axis with the magnitude $4m/s^ {2}$ then the distance covered by the particle in the $9th$ second:-

$1m$
$\dfrac {5}{4}m$
$153m$

Reveal answer Fill a bubble to check yourself

Question 5

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Two constant force $ \overrightarrow F _1 and \overrightarrow F _2 $ acts on a body.these forces displaces the body from point P(1, -2, 3) to Q (2, 3, 7 ) in 2s starting from rest.force $\overrightarrow F _1 $ is of magnitude 9 N and acting along vector $ ( 2 \hat i - 2 \hat j + \hat k ) $ . the positions are in meter. find work done by $ \overrightarrow F _1 $.

$-12J$
$+12J$
$36J$
$-36J$

Reveal answer Fill a bubble to check yourself

Question 6

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

$ 53^0 $
$ 143^0 $
$ 37^0 $
$ 127^0 $

Reveal answer Fill a bubble to check yourself

Question 7

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

The Earth's radius is $6371km$. The order magnitude of the Earth's radius is

$10^3$
$10^2$
$10^7$
$10^5$

Reveal answer Fill a bubble to check yourself

Question 8

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Find the order of magnitude of the mass of the star, whose radius is $384 \times 10^6$ m and average density is $4 \times 10^3$ kg $m^{-3}$ :

30
29
24
21

Reveal answer Fill a bubble to check yourself

Question 9

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Round off following number upto four significant figures.

$45.689$

$45.689$
$45.69$
$45.68$
$45.7$

Reveal answer Fill a bubble to check yourself

Question 10

Multiple choice physics units and measurement: error analysis rounding off digits rounding of digits standard form

Round off 2.0082 to four significant figures.

2.008
2.0082
2.009
2

Reveal answer Fill a bubble to check yourself

Tag: standard form

Questions Related to standard form