"PLEASE ANSWER THESE QUESTIONS.. I'LL MARK AS BRAINLIST...."
1) 10^4 cm^-3 is equal to
a) 1/ 1000 m^3
b) 1/100 m^3
c) 10 m^3
d) 10^3 m^3
2. Which of the following is
not a unit of time?
a) Hour
b) Nano second
c) Micro second
d) Light year
3. The volume of a cube in m^3 is equal to the surface area of the cube in m^2. The volume of the cube is:
a) 64 m^3
b) 216 m^3
c) 512 m^3
d) 196 m^3
4. 1 litre is equal to
a) 1000 ml.
b) 100 cm^3
c)10 ml
d) 10 cm
5. If 1 gm/cm^3 = 10^3 kg/m^3 then 10^6 kg/m^3 =
a) 10^-3 g/cm^3
b) 10^6 g/cm^3
c) 10^3 g/cm^3
d) 10^-6 g/cm^3
6. Density of mercury in MKS is 13600 kg /m^3, then in CGS it is:
a) 1.36 g/cm^3
b) 13.6 g/cm^3
c) 136 g/cm^3
d) 10^3 g/cm^3
II. CONVERT THE FOLLOWING UNITS
a) 9.2 cm = __________m
b) 46 m²= ____________cm^2
c) 72 x 10^6 cm² = ______ m^2
d) 857 mm=__________ m
e) 56 cm^2 = _________ m^2
f) 42 m^3 = _________cm^3
Answers
Question -1 :-
10⁴ cm³ is equal to
a) 1/ 1000 m³
b) 1/100 m³
c) 10 m³
d) 10³ m³
Correct option ☞ (b) 1/100 m³
Explanation :-
As we know,
1 cm³ = 10-⁶ m³
Therefore,
10⁴ cm³ is
= 10⁴ × 10-⁶ m³
= 1/100 m³
Question -2 :-
2. Which of the following is
not a unit of time?
a) Hour
b) Nano second
c) Micro second
d) Light year
Correct option ☞ (d) Light year
Explanation :-
Light year is the practical unit which is used to measure large distances.
For example, the distance between sun and earth or other celestial bodies.
So, light year is the unit of length not time.
Question -3 :-
The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is:
a) 64 m³
b) 216 m³
c) 512 m³
d) 196 m³
Correct option ☞ (b) 216 m³
Explanation :-
Let the side of the cube be l and volume of the cube be V.
We know,
Volume, V = l³
Surface area of cube, S = 6l²
According to the question :-
V = S
⟹ l³ = 6l²
⟹ I = 6 m
Hence,
volume of the cube, V
= 6l²
= 6 × ( 6)²
= 216 m³
Question -4 :-
1 litre is equal to
a) 1000 ml.
b) 100 m³
c)10 ml
d) 10 cm
Correct option ☞ (a) 1000 ml.
Question -5 :-
If 1 gm/cm³ = 10^3 kg/m³ then 10^6 kg/ m³=?
a) 10^-3 g/cm³
b) 10^6 g/cm³
c) 10^3 g/cm³
d) 10^-6 g/cm³
Correct option ☞ (c) 10^3 g/cm³
Explanation :-
Given that,
10^3 kg/m³ = 1 gm/cm³
Then,
10^6 kg/ m³ = 10^6 /10^3 gm/cm³
=10^3 g/cm³
Question -6 :-
Density of mercury in MKS is 13600 kg /cm³, then in CGS it is:
a) 1.36 × 10^7 g/cm³
b) 13.6 g/cm³
c) 136 g/cm³
d) 10^3 g/cm³
Correct option ☞( a) 1.36 × 10^7 g/cm³
Explanation :-
We know,
1 kg /cm³ = 1000 g/cm³
Hence,
13600 kg /cm³
= 13600 × 1000 g/cm³
= 1.36 × 10^7 g/cm³
Question -II :-
a) 9.2 cm = 0.092 m
b) 46 m² = 460000 cm²
c) 72 ×10^6 cm² = 72 × 10 m²
d) 857 mm = 0.857 m
e) 56 cm² = 56 ×10^-4 m²
f) 42 m³= 42000000 cm³
For conversion :-
1 m = 100 cm
1 m =1000 mm
Explanation:
cm³ is equal to
a) 1/ 1000 m³
b) 1/100 m³
c) 10 m³
d) 10³ m³
Correct option ☞ (b) 1/100 m³
Explanation :-
As we know,
1 cm³ = 10-⁶ m³
Therefore,
10⁴ cm³ is
= 10⁴ × 10-⁶ m³
= 1/100 m³
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