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A man goes for a walk, starting from the origin of an xyz coordinate system, with the xy plane horizontal and the x axis eastward. Carrying a bad penny, he walks 1500 m east, 2300 m north, and then drops the penny from a cliff 580 m high. (a) In unit-vector notation, what is the displacement of the penny from start to its landing point? (b) When the man returns to the origin, what is the magnitude of his displacement for the return trip?
A transformer is to be used to provide power for a computer disk drive that needs 5.0 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
A 4-kg block lies on a horizontal table whose coefficient of friction is 0.3. A horizontal rope is redirected by a uniform solid disk (pulley) of mass 2 kg to a mass of 12-kg hanging off the table. How many revolutions does the disk of the pulley m..
A 200-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
A metal ball with a mass of 2.29·10-6 kg and a charge of +4.57 mC has a kinetic energy of 4.51·108 J. how close will it come to the plane before stopping
n oil film (n = 1.40) of thickness 290 nm floating on water (n=1.33) is illuminated with white light at normal incidence
A23.0-mW laser beam of diameter1.85mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
question1a football lineman charges an opponent with a force of 175lbs in direction of 310 degrees. the opponent
What is the work completed by the block and tackle system?
all the data for this problem come from a conservative dialect of vegraveneto a romance language spoken in northern
Two 2.0-cm-diameter insulating spheres have a 6.00cm space between them. find the electric field strength at the midpoint between the two spheres
A vertical straight wire carrying an upward 24-A current exerts an attractive force per unit length of on a second parallel wire 7.5 cm away. What current (magnitude) flows in the second wire? What current (direction) flows in the second wire?
The minimum distance required to stop a car moving at 42.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 67.0 mi/h, assuming the similar rate of acceleration.
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