MASTERINGPHYSICS W/ETEXT ACCESS CODE 6
13th Edition
ISBN: 9781269542661
Author: YOUNG
Publisher: PEARSON C
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Chapter 28, Problem 28.15DQ
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The units
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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 28 Solutions
MASTERINGPHYSICS W/ETEXT ACCESS CODE 6
Ch. 28.1 - (a) If two protons are traveling parallel to each...Ch. 28.2 - An infinitesimal current element located at the...Ch. 28.3 - The accompanying figure shows a circuit that lies...Ch. 28.4 - A solenoid is a wire wound into a helical coil....Ch. 28.5 - Prob. 28.5TYUCh. 28.6 - The accompanying figure shows magnetic field lines...Ch. 28.7 - Prob. 28.7TYUCh. 28.8 - Which of the following materials are attracted to...Ch. 28 - A topic of current interest in physics research is...Ch. 28 - Streams of charged particles emitted from the sun...
Ch. 28 - The text discussed the magnetic field of an...Ch. 28 - Prob. 28.4DQCh. 28 - Pairs of conductors carrying current into or out...Ch. 28 - Suppose you have three long, parallel wires...Ch. 28 - In deriving the force on one of the long,...Ch. 28 - Two concentric, coplanar, circular loops of wire...Ch. 28 - A current was sent through a helical coil spring....Ch. 28 - Prob. 28.10DQCh. 28 - Prob. 28.11DQCh. 28 - Two very long, parallel wires carry equal currents...Ch. 28 - In the circuit shown in Fig. Q28.13, when switch S...Ch. 28 - A metal ring carries a current that causes a...Ch. 28 - Prob. 28.15DQCh. 28 - Prob. 28.16DQCh. 28 - If a magnet is suspended over a container of...Ch. 28 - Prob. 28.18DQCh. 28 - Prob. 28.19DQCh. 28 - A cylinder of iron is placed so that it is free to...Ch. 28 - Prob. 28.1ECh. 28 - Prob. 28.2ECh. 28 - An electron moves at 0.100c as shown in Fig....Ch. 28 - An alpha particle (charge +2e) and an electron...Ch. 28 - A 4.80-C charge is moving at a constant speed of...Ch. 28 - Positive point charges q = +8.00 C and q' = +3.00...Ch. 28 - A negative charge q = 3.60 106 C is located at...Ch. 28 - An electron and a proton are each moving at 735...Ch. 28 - A straight wire carries a 10.0-A current (Fig....Ch. 28 - A short current element dl = (0.500 mm) carries a...Ch. 28 - A long, straight wire lies along the z-axis and...Ch. 28 - Two parallel wires are 5.00 cm apart and carry...Ch. 28 - Prob. 28.13ECh. 28 - A square wire loop 10.0 cm on each side carries a...Ch. 28 - The Magnetic Field from a Lightning Bolt....Ch. 28 - A very long, straight horizontal wire carries a...Ch. 28 - Prob. 28.17ECh. 28 - BIO Bacteria Navigation. Certain bacteria (such as...Ch. 28 - (a) How large a current would a very long,...Ch. 28 - Two long, straight wires, one above the other, are...Ch. 28 - A long, straight wire lies along the y-axis and...Ch. 28 - BIO Transmission Lines and Health. Currents in dc...Ch. 28 - Two long, straight, parallel wires, 10.0 cm apart,...Ch. 28 - A rectangular loop with dimensions 4.20 cm by 9.50...Ch. 28 - Four, long, parallel power lines each carry 100-A...Ch. 28 - Four very long, current-carrying wires in the same...Ch. 28 - Two very long insulated wires perpendicular to...Ch. 28 - Three very long parallel wires each carry current...Ch. 28 - Two long, parallel wires arc separated by a...Ch. 28 - Prob. 28.30ECh. 28 - Lamp Cord Wires. The wires in a household lamp...Ch. 28 - Prob. 28.32ECh. 28 - BIO Currents in the Brain. The magnetic field...Ch. 28 - Calculate the magnitude and direction of the...Ch. 28 - Calculate the magnitude of the magnetic field at...Ch. 28 - A closely wound, circular coil with radius 2.40 cm...Ch. 28 - A single circular current loop 10.0 cm in diameter...Ch. 28 - A closely wound coil has a radius of 6.00 cm and...Ch. 28 - Two concentric circular loops of wire lie on a...Ch. 28 - Figure E28.40 shows, in cross section, several...Ch. 28 - A closed curve encircles several conductors. The...Ch. 28 - As a new electrical technician, you are designing...Ch. 28 - Prob. 28.43ECh. 28 - Prob. 28.44ECh. 28 - A solenoid that is 35 cm long and contains 450...Ch. 28 - A 15.0-cm-long solenoid with radius 0.750 cm is...Ch. 28 - A solenoid is designed to produce a magnetic field...Ch. 28 - A toroidal solenoid has an inner radius of 12.0 cm...Ch. 28 - A magnetic field of 37.2 T has been achieved at...Ch. 28 - An ideal toroidal solenoid (see Example 28.10) has...Ch. 28 - A wooden ring whose mean diameter is 14.0 cm is...Ch. 28 - A toroidal solenoid with 400 turns of wire and a...Ch. 28 - A long solenoid with 60 turns of wire per...Ch. 28 - The current in the windings of a toroidal solenoid...Ch. 28 - A pair of point charges, q = +8.00 C and q' = 5.00...Ch. 28 - At a particular instant, charge q1 = +4.80 106C...Ch. 28 - Two long, parallel transmission lines, 40.0 cm...Ch. 28 - A long, straight wire carries a current of 8.60 A....Ch. 28 - Prob. 28.59PCh. 28 - Prob. 28.60PCh. 28 - An electric bus operates by drawing direct current...Ch. 28 - Figure P28.62 shows an end view of two long,...Ch. 28 - Prob. 28.63PCh. 28 - The long, straight wire AB shown in Fig. P28.64...Ch. 28 - CP Two long, parallel wires hang by 4.00-cm-long...Ch. 28 - The wire semicircles shown in Fig. P28.66 have...Ch. 28 - CALC Helmholtz Coils. Figure P28.67 is a sectional...Ch. 28 - Prob. 28.68PCh. 28 - CALC A long, straight wire with a circular cross...Ch. 28 - CALC The wire shown in Fig. P28.70 is infinitely...Ch. 28 - Prob. 28.71PCh. 28 - Prob. 28.72PCh. 28 - An Infinite Current Sheet. Long, straight...Ch. 28 - Long, straight conductors with square cross...Ch. 28 - A long, straight, solid cylinder, oriented with...Ch. 28 - Prob. 28.76PCh. 28 - DATA You use a teslameter (a Hall-effect device)...Ch. 28 - DATA A pair of long, rigid metal rods, each of...Ch. 28 - CP Two long, straight conducting wires with linear...Ch. 28 - Prob. 28.80CPCh. 28 - BIO STUDYING MAGNETIC BACTERIA. Some types of...Ch. 28 - Prob. 28.82PPCh. 28 - The solenoid is removed from the enclosure and...
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