27. The following lengths are given in meters.
Use metric prefixes to rewrite them so the numerical value is bigger than one but less than 1000.
For example, 7.9 × 10−2 m could be written either as 7.9 cm, or as 79 mm.
(a) 7.59 × 107m;
(b) 0.0074 m;
(c) 8.8 × 10−11m;
(d) 1.63 × 1013
31. The speed limit on some interstate highways is roughly 100 km / h.
(a) What is this in meters per second?
(b) How many miles per hour is this?
40. The average distance between Earth and the Sun is1.5 × 1011m.
(a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second.
(b) What is this speed in miles per hour?
60. Estimate the surface area of a person.
64. Estimate the mass of a virus.
81. Consider the equation
s = s0 + v0 t + a0 t2 / 2 + j0 t3 / 6 + S0 t4 / 24 + c t5 / 120, where s is a length and t is a time.
What are the dimensions and SI units of (a) s0, (b) v0, (c) a0, (d) j0, (e) S0, and (f) c?
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