Answer:
Let the weight of the ruler be X.
Now X acts in the middle, so we have 55-50 = 50cm
Since left hand movement= right hand movement
X(55-50)=90(95-55)
5X= 90×40
X=320cm
Hence the weight of the ruler is 320g
Explanation:
The ball rolls horizontally thus it is not affected by the gravitational acceleration. We assume that velocity is constant since we are not given acceleration. Therefore, acceleration is zero. The speed of the ball after 2 seconds will still be the same given we have a constant velocity system. Option A is the answer.
Magnesium dichloride correct name for the ionic compound, MgCl2
Answer:
He proposed that matter can be converted to energy and vice versa. He first discovered that nuclear-reaction products are lighter than the reactants. He developed the use of nuclear reactions to generate electricity
Explanation:
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