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Chapter 1: Q. 56 (page 31)
An intravenous saline drip has 9.0 g of sodium chloride per liter of water. By definition, 1 mL = 1 cm3 . Express the salt concentration in kg/m3
The concentration of sodium chloride in water is 9 kg/m3
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Problems 51 show a partial motion diagram. For each:
a. Complete the motion diagram by adding acceleration vectors.
b. Write a physics problem for which this is the correct motion
diagram. Be imaginative! Don鈥檛 forget to include enough
information to make the problem complete and to state clearly
what is to be found.
c. Draw a pictorial representation for your problem.
Ice hockey star Bruce Blades is 5.0 m from the blue line and gliding toward it at a speed of 4.0 m/s. You are 20 m from the blue line, directly behind Bruce. You want to pass the puck to
Bruce. With what speed should you shoot the puck down the ice so that it reaches Bruce exactly as he crosses the blue line?
A car skids to a halt to avoid hitting an object in the road.
Draw a basic motion diagram, using the images from the video,
from the time the skid begins until the car is stopped.
Does the object represented in FIGURE Q1.5 have a positive or negative value of ay? Explain.
A baseball player starts running to the left to catch the ball as soon as the hit is made. Use the particle model to draw a motion diagram showing the position and average velocity vectors of the player during the first few seconds of the run.
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