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Fundamentals of Physics and Scientific Method

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Termini in questo insieme (20)

  • What is science?

    Science is a body of knowledge and an ongoing human activity aimed at understanding the laws of nature.

  • Why are measurements important in science?

    Measurements allow knowledge to be expressed in numbers, making it more precise and scientific.

  • Who was Eratosthenes and what did he measure?

    Eratosthenes measured the diameter of the Earth using early scientific methods.

  • What role does mathematics play in science?

    Mathematics is the natural language of science, providing unambiguous expressions and relationships between concepts.

  • What are the general steps of the scientific method?

    Recognize a question, make a hypothesis, predict consequences, test predictions, and formulate a general rule.

  • What is the scientific attitude?

    It involves inquiry, experimentation, willingness to admit error, and acceptance of experimental findings.

  • What distinguishes a scientific hypothesis?

    A scientific hypothesis is an educated guess that can be tested and potentially disproved by experiment.

  • What is the difference between a scientific law and a theory?

    A law is a repeatedly tested hypothesis not contradicted; a theory is a synthesis of well-tested hypotheses and facts.

  • How do science, art, and religion differ?

    Science studies natural phenomena, art interprets human experience, and religion involves faith and worship.

  • What is the relationship between science and technology?

    Science gathers knowledge; technology applies scientific knowledge for practical purposes and tools.

  • Why is physics considered the basic science?

    Physics underlies all other sciences like chemistry, biology, geology, and astronomy.

  • What are the fundamental physical properties?

    Length, mass, time, and charge are fundamental physical properties; others are combinations of these.

  • What is a derived unit? Give an example.

    Derived units combine fundamental properties, e.g., 1 Newton (N) = 1 kg·m/s\(^2\).

  • What is the SI base unit for length?

    The meter (m) is the SI base unit for length.

  • What is the purpose of metric prefixes?

    Metric prefixes simplify conversions and avoid writing very large or small numbers.

  • Convert 220 meters to centimeters.

    220 m = 22,000 cm by moving the decimal two places to the right (1 m = 100 cm).

  • How do you convert from a smaller to a larger metric unit?

    Move the decimal point to the left by the difference in powers of ten.

  • How do you convert from a larger to a smaller metric unit?

    Move the decimal point to the right by the difference in powers of ten.

  • Convert 20 nanograms (ng) to micrograms (μg).

    20 ng = 0.02 μg by moving the decimal 3 places to the left (1 μg = 10-6 g, 1 ng = 10-9 g).

  • Why is it difficult to switch from British to metric units in the US?

    Many machines are calibrated in British units, making conversion costly and complex.