Question

-) Balance the following equations:
HS + C12
S
+
НСІ
A1
HO
A103
H
Zns
Zno
SO
(iv)
Pb30. +
HC1
PbC13
HO
+ C1
MgCl₂ +
NH.OH
NH.CI
Mg(OH):​

Answer 1

Answer:

1

13. We all know that the different well known effects of forces come into play as a result of the mutual interaction of

two entities. The manifold effects of forces include a change in the speed of the objects on which the force acts. It

turns out that the energy associated with a moving object, goes up by a factor of four, when its speed doubles, it goes

up by a factor of nine when the speed goes up by a factor of three and when it goes up by a factor of sixteen the speed

goes up by a factor of four. A force, acting on a surface also exerts a pressure on it and thpressure is dependent on the

area over which the force acts perpendicularly also there is one special kind of force which, in

general always tends to slow down a moving object.

4

(a) Give one example of a situation in which the force acting on a body slows down a moving object without having

any direct contact with that body.

(b) By what factor will the energy of a moving object go up if its speed increases by a factor of 5?

(c) A given force 'F' is acting parallel to a long plane surface of area 'A'. How much pressure does this force exert on

this plane surface?

d) Name the force that in general always tends to slow down a moving object and give one example of its slowing

Explanation:

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