Physics
1.
Define:
(i) Displacement
(ii) Velocity
(iii) Acceleration
(iv) Scalar & Vector Quantities
(v) Uniform & Non-uniform speed
2.
S
I Units of (i) Speed (ii) Velocity (iii) Retardation (iv) time
3.
Differentiate
distance and displacement ( give at least 3 differences)
4.
Derive
equation of II law of motion
5.
A farmer moves along the boundary of a square field
of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end
of 2 minutes 20 seconds?
6.
A
train starting from rest attains a velocity of 72 km /h in 5 minutes. Assuming that the acceleration is uniform, find
(i) the acceleration and (ii) the distance travelled by the train for attaining
this velocity.
7.
An
athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered
and the displacement at the end of 2 minutes 10 s?
Chemistry
8.
Define
: (i) Latent heat of vaporization (ii)
latent heat of fusion.
9.
When
we pour some acetone or petrol on the palm, we get a cooling sensation . Give
reason?
10. Why does steam produce more severe
burns on the skin as compared to boiling water ?
11.
Give reasons for the following observation:
The smell of hot sizzling food reaches we
several meters away,
but to get the smell from cold food we have to go closer.
12. Give
reasons
(a) A gas fills
completely the vessel in which it is kept in.
(b) A gas exerts
pressure on the walls of the container.
(c) A wooden table
should be called a solid.
(d) We can easily move our hand in air but can‘t
through a solid block of wood
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