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Pepsi [2]
3 years ago
10

Why sodium &pottasium are kept under kerosine

Physics
1 answer:
Afina-wow [57]3 years ago
5 0
As they are Alkali metals (group 1), they are extremely reactive in both air and water so must be stored in kerosine to stop them from reacting with the air or water.
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A rock is lifted by a machine to a height of 10m. If it has a mass of 22 kilograms
zmey [24]

Answer:

2156J

Explanation:

Given parameters:

Height of lift  = 10m

Mass  = 22kg

Unknown:

Work done by the machine  = ?

Solution:

Work done is the force applied to move a body through a certain distance.

So;

        Work done  = Force x distance

Here;

       Work done  = mass x acceleration due to gravity x height

      Work done  = 22 x 9.8 x 10  = 2156J

5 0
3 years ago
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maksim [4K]

Answer:

B. people with OCD know their disorder is irrational

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2 years ago
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3 years ago
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inna [77]

Answer:

True

Explanation:

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3 0
3 years ago
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When the velocity of a mass on a spring is zero, the acceleration is at
Akimi4 [234]

Answer:

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