Free fall: height h takes time t. Height 4h takes time: MCQ with Answer and Explanation
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Question #1
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The material of a permanent magnet should have
Question #2
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The number of significant figures in 0.0034060 is
Correct Answer: Option B
Explanation:
Leading zeros (before first non-zero digit) are not significant. So 0.0034060: the first non-zero is 3, then 4,0,6 are significant, and the trailing zero after decimal is significant. Thus significant digits are 3,4,0,6,0 — 5 digits. Note: The last zero indicates precision. Answer is 5.
Leading zeros (before first non-zero digit) are not significant. So 0.0034060: the first non-zero is 3, then 4,0,6 are significant, and the trailing zero after decimal is significant. Thus significant digits are 3,4,0,6,0 — 5 digits. Note: The last zero indicates precision. Answer is 5.
Question #3
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The graph between velocity and time for uniform acceleration is
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