An Observer Is Standing on the Platform of a Railway

question 7

Multiple Choice

An observer is standing on the platform of a railway station.A train goes through the station without stopping.If the frequency of the train whistle decreases by a factor of 1.2 as it approaches and then passes him,calculate the speed of the train (assume the speed of sound in air = 343 m/s) .

• A)112 km/hr
• B)31.2 km/hr
• C)56.0 km/hr
• D)62.0 km/hr
• E)122 km/hr

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Definitions:

Statistical Significance

Indicates the likelihood that an observed effect or relationship exists because of chance within a predefined level of confidence, typically through a p-value.

Double-Blind Techniques

Research methods used to eliminate bias, in which neither the participants nor the experimenters know who is receiving a particular treatment.

Mastery-Oriented

describes an approach or attitude towards learning and achievement that focuses on gaining competence and understanding material, rather than comparison to others.

Intellectual Quality

The level of cognitive capabilities, including creativity, analytical skills, and critical thinking.