Questions and Answers of College Physics Reasoning

Points A, B, C, and D in Figure P1.7 lie along a line. The distance from point A to point B is 3.45 km, and the distance from B to CFigure P1.7is 5.4 km. What is the distance from A to C? Be sure to
Give and discuss one advantage and one disadvantage of the SI system compared with the U.S. customary system of units.
A bucket contains several rocks with a combined mass (including the bucket) of 4.55 kg. Another rock of mass 0.224 kg is added to the bucket. What is the total mass of the bucket plus rocks? Be sure
Which of the following quantities have the properties of a vector and which have the properties of a scalar?mass................................densityvelocity
Determine the number of significant figures for all the values listed in Tables 1.2 and 1.3 (see page 11) that are not exact values..Table 1.2 Number of Significant Figures for Each Quantity Time
The standard meter used to be a metal bar composed of platinum and iridium. The current standard is based on the measured speed of light and an optical device called an interferometer. What
A red blood cell has a radius of approximately 5.0 × 10–6 m. A large number of red blood cells are laid side by side in a line of length 1.0 m. How many cells are in the line?
What physical property, process, or situation is described by the following combinations of primary units? (For example, the combination of units kilograms per square meter can be used to measure the
You decide to walk from Chicago to New York City. Approximately how many steps will you take during this journey?
Which of the following are units of volume?cubic meters................acres/m2mm × mi2......................hours × mm3/skiloseconds × ft2..........mm × cm × mm2/ftkg2 × cm
You take a long walk on a sandy beach. When you return home, you dump the sand out of one of your shoes and find that the pile has a volume of 1.5 cm3. If the volume of one grain of sand is
Discuss the difficulties of giving a definition of the concept of “time” without using any other scientific terms.
Suppose a friend told you that the density of a sphere is 4/3 πr4, where r is the radius of the sphere. Compute the dimensions of this expression and show that it cannot be correct.

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