Chapter 1, Problem 1.80E

How many weeks are in a decade?

Without actually performing the calculations indicated, tell to how many significant digits the answer to the calculation should be expressed. (9.7871)(2)(0.00182)(43.21) (67.41+0.32+1.98)/(18.225) (2.001103)(4.7106)(68.224102) (72.15)(63.9)[1.98+4.8981]

A human brain weighs about 1 kg and contains about1011 cells. Assuming that each cell is completely filledwith water (density = 1 g/mL), calculate the length ofone side of such a cell if it were a cube. If the cells arespread out into a thin layer that is a single cell thick,what is the surface area in square meters?

True or false: The “size” of a degree on the Celsius scale is thesame as the “size” of a degree on the Kelvin scale.

The state of Colorado is listed in a road atlas as having a population of 5,546,574 and an area of 104,091 square miles. Do thenumbers of significant figures in these two quantities seem reasonable? If not, what seems to be wrong with them?

Finally, sometimes the desired value does not directly match the units given but is derived from the calculation required. For example, a sheet of metal that has a volume of 45.5 cm3 has a width of 14.8 cm and has a length 15.9 cm. What is the thickness (that is, the height) of the metal sheet in millimeters?

The cup is measure of volume widely used in cookbooks. One cup is equivalent to 225mL. What is the density of clover honey (in grams per milliliter) if three quarters of cup has a mass og 252g?