Question: Why are simplified models used in scientific study if they
Why are simplified models used in scientific study if they do not exactly match real conditions?
Answer to relevant QuestionsWhy is it important to write quantities with the correct number of significant figures? Write these numbers in scientific notation: (a) The U.S. population, 290 000 000; (b) The diameter of a helium nucleus, 0.000 000 000 000 003 8 m. Solve the following problem and express the answer in meters with the appropriate number of significant figures and in scientific notation: 3.08 × 10−1 km + 2.00 × 103 cm Density is the ratio of mass to volume. Mercury has a density of 1.36 × 104 kg/m3. What is the density of mercury in units of g/cm3? An equation for the period T of a planet (the time to make one orbit about the Sun) is 4π2r3/( GM ), where T is in s, r is in m, G is in m3/(kg⋅s2), and M is in kg. Show that the equation is dimensionally correct.
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