30ms-1
25ms-1
20ms-1
15ms-1
Correct answer is A
S = \(\frac{1}{2} (a + b)h\)
60 = \(\frac{1}{2}(15 + 25)h\)
h = \(\frac{1200}{40} = 30\)m/s
An atom \(^{234}_{91} P\) emits a gamma radiation. The resultant nuclide is
\(^{230}_{90} Th\)
\(^{234}_{91} Pa\)
\(^{234}_{90} Th\)
\(^{234}_{89} Ac\)
Correct answer is B
No explanation has been provided for this answer.
Fusion is not usually used for generating electric power because
no energy is released when fusion takes place
very high temperatures are required to initiate fusion reaction
the raw materials needed is not easily available
heavy nuclei are involved
Correct answer is B
No explanation has been provided for this answer.
21
18
15
12
Correct answer is A
\(768 \to 384 \to 192 \to 96 \to 48 \to 24 \to 12 \to 6\)
7 x 3 = 21yrs
4.2 x 108ms-1
1.9 x 108ms-1
4.2 x 105ms-1
1.8 x 105ms-1
Correct answer is A
No explanation has been provided for this answer.
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