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Class 10
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Basic Science
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Hard Questions
Basic Science
General Knowledge
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>
SI unit of potential energy?
Hard
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>
How many feet are in a football field that is 100 yards?
Hard
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>
What is the unit of viscosity? Please explain.
Hard
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>
On a scale drawing,
1
/
4
inch
=
1
foot. What are the dimensions on the scale drawing for a room that is
1
8
feet by
1
6
feet?
Hard
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>
One year on Mercury is equal to
8
7
.
9
7
Earth days. One year on Pluto is three times the length of one Mercury year minus
1
6
.
2
1
days. How long is one year on Pluto?
Hard
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>
The dimensions of Planck's constant is
A
M
2
L
2
T
−
1
B
M
2
L
T
−
2
C
M
L
2
T
−
1
D
M
L
2
T
−
2
Hard
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>
Choose the correct answer from the alternatives given.
Time period is the time taken to complete one oscillation. This definition of time period is true for
A
longitudinal Wave
B
transverse Wave
C
simple Pendulum
D
All the above
Hard
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>
The distance
r
of the block at time
t
is :
A
2
R
cos
2
ω
t
B
4
R
(
e
2
ω
t
+
e
−
2
ω
t
)
C
2
R
cos
ω
t
D
4
R
(
e
ω
t
+
e
−
ω
t
)
Hard
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>
How was it determined that a parsec is
3
.
2
6
light years?
Hard
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>
All the surfaces shown in figure (12-E15) are frictionless. The mass of the car is M, that of the block is m and the spring has spring constant k. Initially, the car and the block are at rest and the spring is stretched through a length
x
0
when the system is released.
Find the time period(s) of the two simple harmonic motions.
Hard
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>