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Five resistors are connected purely in parallel to a battery. Three of these resistors are equal and the current through each is I. The current through the fourth resistor is 3.2 times larger than I, and the current through the fifth resistor is 3.2 times smaller than I. What is the resistance, in Ohms, of the fourth resistor if the equivalent resistance of all five resistors is 7 Ohms?
In a skating stunt known as "cracking-the-whip," a number of skaters hold hands and form a straight line. estimate the magnitude of the centripetal force that acts on him
A bob of mass m = 0.250 kilogram is suspended from a fixed point with a mass less string of length L = 22.0 centimeter. What tangential speed v must the bob have therefore that it moves in a horizontal circle with the string making an angle 21.0 deg..
a person is exercising burning 550 calhr. while doing this exercise they breath deeply so the volume they take into and
Resesrch paper about Selection Of Material and spicificly about Design of Properties
A bee ?ies to a ?ower 548 m due south of its hive. The bee's speed in still air is 0.69 m/s, and there is a wind blowing toward the south at 0.19 m/s. How long will it take the bee to travel to the ?ower and back to the hive? Answer in units of s.
You use a spring (K=89N/m) to pull a 45kg box across the rough floor (μ=0.13). The spring stretches 3m. What is the horizontal acceleration of the box
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. What is the minimum velocity so the string will not go slack as the ball moves around the circle
A hang glider and its pilot have a total mass equal to 120kg.While executing a 360 degree turn, the glider moves in a circlewith an 8-m radius. What is the net force on the hang glider
A rocket fires two engines simultaneously. One produces a thrust of 700N directly forward while the other gives a thrust of 472N at an angle 38.8? Above the forward direction. Find the magnitude of the resultant force which these engines exert on the..
A 75 g spherical ball rolls without slipping down a ramp that makes an angle of 20 degrees with the horizontal. Find the magnitude and direction of the frictional force on the ball
The sun's rays are focused, using a lens as a "burning glass." All the visible sunlight entering a lens of radius 2.97 cm is concentrated in a circular spot of radius 1.05 mm. Find the intensity of visible light in the spot if the intensity of visibl..
how many drops of water are in all the oceans on earth? assume that 1cm3 contains 25 drops of water. remember that this
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