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Determine the average pressure on the soles of the feet of a standing 81.3 kilogram person due to the contact force with the floor? Each foot has a surface area of 0.02 m2.
in an eye that is farsighted the eye focuses parallel rays so that the image would form behind the retina. in an eye
A 20-m long steel wire (cross-section 1.0 cm^2, Young's modulus 2.0 ´ 10^11 N/m^2), is subjected to a load of 25 000 N. How much will the wire stretch under the load
The headlights on a certain car are gauged to be1.9 m apart. The diameter of the pupil in a human eye is 2.5 mm. What is the furthest distance at which a human eye could obviously see the headlights as 2 separate lights? Utilize a wavelength of 562 n..
A 40.9 kilogram weather rocket generates a thrust of 1125 Newton. The rocket, pointing upward, is clamped to the top of a vertical spring. Determine how much is the spring compressed
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 21m that makes an angle of 50? with the vertical, Calculate Tarzan's speed just before he reaches Jane
A rock weighing 7043 N rock with a volume of 18 L iscompletely submerged in mercury. The density of mercury is 13.6 kg/L. Determine the density of the rock
a 2.3 kg object attached to an ideal spring is undergoing simple harmonic motion. its displacement is given by function, what is the maximum accleration of the object
The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state
Obtain an approximate solution for this case. Sketch your solution E(t) and compare the result with the usual damped oscillator solution. The oscillator has mass m, spring k, and constant friction force Fo. (You may find it helpful to write a diff..
In a simple of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 1.1 x 106 m/s. Determine the radius of the electron's orbit
A mountain climber, in the process of crossing among two cliffs by a rope, pauses to rest. She weighs 555 N. She is closer to the left cliff than to 2 the right cliff, with the result that the tensions in the left and the right sides of the rope are..
A railroad car of mass 2.70 multiplied by 104 kg moving at 4.00 m/s collides and couples with two coupledrailroad cars, each of the same mass as the single car and movingin the same direction at 1.20 m/s.
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