We won't usually be too picky about significant digits, but in this question, we are: (a) How many significant digits are there in the quantity 0.460 m/s? (b) Convert 0.460 m/s to units of kilometers per hour and express it with the appropriate number of significant digits. (c) If a 5 kg object is moving at 0.460 m/s, what is its kinetic energy in joules? Again, be sure to express your answer with the appropriate number of significant digits.