Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 18.1, Problem 1aTH
What is the direction of the 
at any time, state that explicitly. Explain.
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Please help me on the following question (Please refer to image below)An Olympic lifter (m = 103kg) is holding a lift with a mass of 350 kg. The barexerts a purely vertical force that is equally distributed between both hands. Each arm has amass of 9 kg, are 0.8m long and form a 40° angle with the horizontal. The CoM for each armis 0.5 m from hand. Assuming the lifter is facing us in the diagram below, his right deltoidinserts 14cm from the shoulder at an angle of 13° counter-clockwise from the humerus.A) You are interested in calculating the force in the right deltoid. Draw a free body diagramof the right arm including the external forces, joint reaction forces, a coordinate system andstate your assumptions.B) Find the force exerted by the right deltoidC) Find the shoulder joint contact force. Report your answer using the magnitude and directionof the shoulder force vector.
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Question 6:
Chlorine is widely used to purify municipal water supplies and to treat swimming pool
waters. Suppose that the volume of a particular sample of Cl₂ gas is 8.70 L at 895 torr
and 24°C.
(a) How many grams of Cl₂ are in the sample?
⚫ Atomic mass of CI = 35.453 g/mol
• Molar mass of Cl₂ = 2 x 35.453 = 70.906 g/mol
Solution:
Use the Ideal Gas Law:
Step 1: Convert Given Values
• Pressure: P = 895 torr → atm
PV=
= nRT
1
P = 895 ×
= 1.1789 atm
760
•
Temperature: Convert to Kelvin:
T24273.15 = 297.15 K
• Gas constant: R = 0.0821 L atm/mol. K
Volume: V = 8.70 L
Step 2: Solve for n
.
PV
n =
RT
n =
(1.1789)(8.70)
(0.0821)(297.15)
10.25
n =
= 0.420 mol
24.405
Step 3: Calculate Mass of Cl₂
Final Answer: 29.78 g of Cl₂.
mass nx M
mass=
(0.420)(70.906)
mass=
29.78 g
Chapter 18 Solutions
Tutorials in Introductory Physics
Ch. 18.1 - What is the direction of the angular velocity of...Ch. 18.1 - What is the direction of the wheel’s angular...Ch. 18.1 - Rank the magnitudes of the centripetal...Ch. 18.1 - For each situation described below, describe a...Ch. 18.1 - The equation a0andaR0 is not a correct vector...Ch. 18.2 - Prob. 1aTHCh. 18.2 - Draw an extanded freebody diagram for the ruler at...Ch. 18.2 - Rank the magnitudes of all the forces on your...Ch. 18.2 - Is the rotation of the ruler about the pivot in a...Ch. 18.2 - In the boxes at right, indicate the direction of...
Ch. 18.2 - Check that your descriptions of the motion of the...Ch. 18.2 - Parts iiv refer to the instant shown in the...Ch. 18.2 - Suppose that each force shown above is exerted for...Ch. 18.3 - What does this observation imply about the net...Ch. 18.3 - Draw an extended free-body diagram for theboard in...Ch. 18.3 - Would the board remain at rest in this case?...Ch. 18.3 - On the figure above, mark the approximate location...Ch. 18.3 - Is the amount of mass of the system (clay and...Ch. 18.3 - A T-shaped sheet of uniform thickness has a...
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