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The heels on a pair of women's shoes have radii of 0.5 cm at the bottom. If 30% of the weight of a woman weighing 480 N is supported by each heel, find the stress on each heel?
You shoot an arrow into the air. Two seconds later arrow has gone straight upward to a height of 30 meters above its launch point. a) What was the arrow's initial speed? b) How long did it take for the arrow to first reach a height of 15 meters ab..
The magnetic field of the brain has been measured to be approximately 3.0 x 10^-12 T. Although the currents that cause this field are quite complicated, we can get a rough estimate of their size by modeling them as a single circular current loop 1..
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. What torque is created by these muscles about the ankle joint
a lead shot is projected from the ground level with a velocity u at an angle o to the horizontal. given that the times
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers. What is the tension in the middle
You heat a 507 cm3 sample of a substance from 131 °C to 265 °C, Calculate the coefficient of volume expansion of this substance
An empty parallel plate capacitor is connected between the terminals of a 7.0 V battery andcharged up. The capacitor is then disconnected from the battery,and the spacing between the capacitor plates is quadrupled. As a result of this change, what is..
A .400 kg ball on a .500 mstring rotates in a circular path in a vertical plane. what is the force (tension) in the string when the ball is at the top of thecircle
A certain EM wave has a wavelength of 4 X 10 ^-7 m and a speed of 2.5 X10^8 m/s in a partcular material ( not a vacuum). what is the wavelength of this wave in a vacuum
An electric field of 220000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -10C at the spot.
What is the saturation activity of 24Na that can be induced in a 400 g sample of NaCl with a constant thermal-neutron fluence rate of 5 x 1010 cm-2 sec-1
100 g ball of clay is thrown horizontally with a speed of 13m/s toward a 900g block resting on a frictionless surface. It hits the block and sticks. The clay exerts a constant force on the block during the 7 ms it takes the clay to come to rest re..
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