SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Within a reasonable error of measurement, sunrise and sunset are periodic events. Also new moon occurs periodically. Hence, these events can be used to measure time.
Detailed explanation-2: -To measure time, the event should be such that it repeats after an equal interval of time. Such a type of motion is known as periodic motion.
Detailed explanation-3: -Solution : The motion of a pendulum is a periodic event which can be used to measure time or the duration between two events.
Detailed explanation-4: -Events that take place after regular interval of time are called periodic event. Example: rising of sun every morning is a periodic event.
Detailed explanation-5: -In an experiment to determine the acceleration due to gravity g, the formula used for the time period of a periodic motion is T=2√7(R−r)5g. The values of R and r are measured to be (60±1)mm and (10±1)mm, respectively. In five successive measurements, the time period is found to be 0.52s, 0.56s, 0.57s, 0.54s and 0.59s.