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"Simplify and with the sourcr in the \\( \\frac { \\cos \\theta } { 2 } \\times \\frac { 5 } { - 8 } = ( - 1 ) ^ { 4 } \\times 5 ^ { 4 } = 5 \\)\nUsing the identity. Find \\( ( 2 x + 3 y ) ^ { 2 } \\) )\nAn item marked at 7.870 is sold for \\( z \\). The is the curcent ad\nAn itern marked at 7.890 is sold for 2.71 . What is the curres?\ndiscount \\( \\% \\) (d) \\( 8 \\left( b ^ { 3 } + 3 \\right) + 5 \\) ? \\( \\quad \\begin{array} { l l } { m + 1 + 5 = 7 } & { \\text { - } } \\\\ { \\text { Find } n + 50 \\text { thit } ( - 3 ) ^ { n + 1 } \\times ( - 3 ) ^ { 5 } = ( - 3 ) ^ { 7 } . } & { \\text { WhARKS } } \\end{array} \\)"

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Q1
In a glass tank of water, a body weighing 50 N is immersed. Water weighing 5 N is then ejected out of the bucket. Calculate the buoyant force acting on the body. [1 mark]


A. 4 N
B. 5 N
C. 6 N
D. 8 N


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Q2
Given below are the quantum numbers for 4 electrons.

A. n=3,l=2, m1=1, ms=+1/2

B. n=4,l=1, m1=0, ms=+1/2

C. n=4,l=2, m1=2, ms=1/2

D. n=3,l=1, m1=1, ms=+1/2

The correct order of increasing energy is :


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Q3
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(1) n = 1, l = 0, m = 0
(2) n = 2, l = 1, m = -1
(3) n = 2, l = 1, m = +1
(4) n = 3, l = 2, m = +1
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Q4
In an AP: (i) given a=5,d=3,an=50, find n and Sn (ii) given a=7,a13=35, find d and S13 (iii) given a12=37,d=3, find a and S12.
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Q5
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