Srcmncewt Drcrts
Practice
1. Statethenumberof significantdigits in eachvalue:
I
e
a)
12.7
e)
0,1
b)
2.03
f)
0.030
c)
100
s)
0.000400
d)
2t.053
h)
70000
s
2. Roundeachvalueto the indicatednumberof significantdigits.
Original
Value
a)
0.1495
b)
29.95
Desired
Significant
Digits
a
Rounded
Value
C),IS C}
3
2(: rLl
tSci
a
c)
139.49
d)
10.54
e)
200.6
D
9.998t2
2
s)
80.376
4
h)
0.0462
a
i)
6.495
I
J
ET
L
,LC I
a
J
I t
It.'
3C,tS
l"',r-,il/,;')
b
number of significant
3 . Complete the following calculations and round your answerto the correct
digits. You may use a calculator.
a)15/2.50=
/ I0 =
b) 1600
4.6=
c)9.32x
6' C
ILAD."
L/?
),f xlo'"
d) 12.403x20 =
e) 6.25x 8.400I 2'35 =
numberof significant
4. Completethe following calculationsandroundyour answerto the correct
digits. You mayusea calculator.
a)129-4.326=
lA5'
d ) 9 . 3 2+ 1 5 . 1- 6 . 2 1 5=
b) 760+ 42.8=
K'\
e) 19.16+ 4.2x 20.4=
c) 8.42+ 4.3+ 10,06=
.I] t I
Name:
Scnnce 10(PHYS-2A)
ScrBurrrrcNorerrom
Practice
1 . Expressthefollowing measurements
in scientificnotation:
a) Radiusof Earth:6 370 km
b) Wavelengthof a RedLaser:0.000000 632 8 m
h, 3-7x i05lcm
6 , 3 a8 .<Ut^1t-r
/'bO<lO'aC
c) Chargeof anElectron:0.000000 000 000 000 000 160C
in decimalnotation:
2. Expressthe following measurements
1.013x105
Pa
Pressure:
a) Atmospheric
/O/ 3oo P.i
b) Massof Earth:5.98x102kg
3
W
c) Powerof a Laser:4.0x10-3
0,U>qA
984
ooc ocur oftr ccT:, .zrr 1rt) clct:
L*)
speedin
the speedof light to be about299800 000 m/s. Express^this.
Scientistshavemeasured
I ,nl''
l0
v
,
A
1qB
scientificnotation,to 4 signifiiantdigits.
4. Evaluatethe following powers:
a) 104x 103=
b) 103+ 10-2=
=
c) (1031-2
la-
lo{
Itl"6
10-r x (10-2)4
d;10ry tor=
5. Evaluatethe following expressions.Recordyour answerin scientificnotationto thecorrectnumber
of significantdigits.
4,7s< lO ',
lq
+ (6.32x10t)=
a) (3.00x108)
/o-t(
+ l.32xlC-2r=
b) 9.05x10-22
J.llr
^ \ -2.52
- x l0-2
't
14./6xlf")"-
{ r 3 et / D )
Name:
ScENcE 10 (PHYs-2B)
fl