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Workers pushing a 180 kg trunk across a level floor encounter a 10m long region where the floor becomes increasingly rough; the coefficient of kinetic friction increases from mo =.17to .79 according to the expression (mk = mo +ax2) where a= 0.0062 m-2, and x is thedistance in meters from the beginning of the rough region. How much work does it take to push the trunk at constant speed across the region?
Two identical violin strings, when in tune and stretched withthe same tension, What is the highest possible fundamental frequency of the retuned string
Six concentric conducting spheres, A, B, C, D, E, and F having radii R, 2R, 3R, 4R, 5R, and 6R, respectively. Spheres B and C are connected by a conducting wire, as are spheres D and E. Determine the equivalent capacitance of this system.
A girl with a mass of 40 kg is swinging from a rope with a length of 3.2 m. What is the frequency of her swinging
a boy whirls a small stone attached to a 1.5m string in a horizontal circle 2.0m above the ground. the string suddenly
A series ac circuit contains a 190 ohms resistor, a 14.0 mH inductor, a 4.50uF capacitor, and an ac power source of voltage amplitude 45.0 V operating at an angular frequency of 360 rad/s
An RLC circuit is used in a radio to tune into an FM station broadcasting at f = 99.7 MHz. The resistance in the circuit is R = 12.4 ?, What capacitance should be used
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 4:15. obtain the rms output voltage of the transformer
an airplane is dropping bales of hay to cattle stranded in a blizzard on the great plains. the pilot releases the bales
1 you are conducting an osmosis experiment with a semi-permeable dialysis membrane of fixed pore size. if the solution
A guitar string is supposed to vibrate at 247 Hz but is measured toactually vibrate at 255 Hz. By what percentage should the tensionon the string be changed to get the frequency to the correctvalue?
a positively charged bead having a mass of 1.00 g falls from rest in a vacuum from a height of 7.50 m in a uniform
A person drops a cylindrical steel bar (Y = 1.00 × 1011 Pa) from a height of 1.00 m (distance between the floor and the bottom of the vertically oriented bar). The bar, of length L = 0.51 m, what is the maximum compression of the bar
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