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Byju's Answer
Standard VII
Mathematics
Division of Decimals by Powers of 10
If X 8.00 t 0...
Question
If X 8.00 t 0.04 cm and Y = 4.00 t 0.04 cm, should be expressed as Y then 0 (1) 2.00 t 0.01 (2) 2.00 0.02 (3) 2.00 t 0.03 (4) 2.00t 0.04
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Q.
The length of side of square is 2.00 cm. The perimeter of the square is
a.) (8.00 ± 0.01) cm
b.) (8.00 ± 0.02) cm
c.) (8.00 ± 0.03) cm
d.) (8.00 ± 0.04) cm
Q.
The volume of two bodies are measured to be
V
1
=
(
10.20
±
0.02
)
cm
3
and
V
2
=
(
6.40
±
0.01
)
cm
3
.
The difference in volume with appropriate significant figures is
Q.
At time
t
=
0
, force
→
F
1
=
(
−
4.00
^
i
+
5.00
^
j
)
N
acts on an initially stationary particle of mass
2.00
×
10
−
3
k
g
and force
→
F
2
=
(
2.00
^
i
−
4.00
^
j
)
N
acts on an initially stationary particle of mass
4
×
10
−
3
k
g
, then at
t
=
0
to
t
=
2
m
s
Q.
The fees structure for one-day admission to a swimming pool is as follows
Daily Admission Fees in Rs.
Member
Children
Adult
Before 2.00 p.m.
20
30
After 2.00 p.m.
30
40
Non - Member
Before 2.00 p.m.
25
35
After 2.00 p.m.
40
50
Write the matrix that represents the additional cost for non-membership.
Q.
For the situation described in figure , the magnetic field changes with time according to
B
=
(
2.00
t
3
−
4.00
t
2
+
0.8
)
T
and
r
2
=
2
R
=
5.0
c
m
a) Calculate the force on an electron located at
P
2
at t=2.00 s
b) What are the magnitude and direction of the electric field at
P
1
when t=3.00 s and
r
1
=
0.02
m
,
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