Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 23, Problem 5CQ
To determine
Whether energy can be restored in an ecosystem.
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Sketch the resulting complex wave form, and then say whether it is a periodic or aperiodic wave.
During a concentric loading of the quadriceps muscle in the upper leg, an athlete extends his lower leg from a vertical position (see figure (a)) to a fully extended horizontal position (see figure (b)) at a constant angular speed of 45.0° per second. Two of the four quadriceps muscles, the
vastis intermedius and the rectus femoris, terminate at the patellar tendon which is attached to the top of the tibia in the lower leg. The distance from the point of attachment of the patellar tendon to the rotation axis of the tibia relative to the femur is 4.10 cm in this athlete.
a
b
(a) The two quadriceps muscles can exert a maximum force of 225 N through the patellar tendon. This force is applied at an angle of 25.0° to the section of the tibia between the attachment point and the rotation axis. What is the torque (in N⚫ m) exerted by the muscle on the lower leg
during this motion? (Enter the magnitude.)
N⚫ m
(b) What is the power (in W) generated by the athlete during the motion?
W
(c)…
Chapter 23 Solutions
Integrated Science
Ch. 23.2 - Which is the correct hierarchy? a. ecosystem,...Ch. 23.2 - Prob. 2SCCh. 23.3 - Prob. 3SCCh. 23.7 - Prob. 4SCCh. 23.7 - Prob. 5SCCh. 23.7 - Prob. 6SCCh. 23.8 - Prob. 7SCCh. 23.9 - Prob. 8SCCh. 23.9 - Prob. 9SCCh. 23.9 - Prob. 10SC
Ch. 23.10 - Prob. 11SCCh. 23.10 - The kind and number of food organisms in an...Ch. 23.10 - Prob. 13SCCh. 23.12 - Prob. 14SCCh. 23.14 - Prob. 15SCCh. 23 - Prob. 1CQCh. 23 - Prob. 2CQCh. 23 - Prob. 3CQCh. 23 - List several biotic and abiotic factors that...Ch. 23 - Prob. 5CQCh. 23 - Prob. 6CQCh. 23 - Prob. 7CQCh. 23 - Prob. 8CQCh. 23 - Describe four different roles played by bacteria...Ch. 23 - Prob. 10CQCh. 23 - Prob. 11CQCh. 23 - Prob. 12CQCh. 23 - Prob. 13CQCh. 23 - Prob. 14CQCh. 23 - Prob. 16CQCh. 23 - Prob. 17CQCh. 23 - Prob. 18CQCh. 23 - Prob. 19CQCh. 23 - Prob. 20CQCh. 23 - Prob. 1PEACh. 23 - Prob. 2PEACh. 23 - Prob. 3PEACh. 23 - Prob. 4PEACh. 23 - Prob. 1PEBCh. 23 - Prob. 2PEBCh. 23 - Prob. 3PEBCh. 23 - Prob. 4PEB
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