The achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. in extreme activities, such as sprinting, it can be subjected to forces as high as 15 times a person's weight. according to one set of experiments, the average area of the achilles tendon is 77.3 mm2 , its average length is 30 cm , and its average young's modulus is 1474 mpa .
how much tensile stress is required to stretch this muscle by 5.00% of its length?

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.