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Question: A contestant in a winter sporting event pulls a 46 kg block of ice in the positive horizontal direction with a rope over his shoulders across a frozen lake as shown in the figure. Assume the coefficients of static and kinetic friction are ?s=0.1 and ?k=0.03. Calculate the minimum force required to get the block moving?
a an ionization chamber is used with an electrometer capable of measuring 50microa. calculate the rate at which
A 75 kg person escapes from a burning building by jumping from a window 25-m above a catching net. Assuming that air resistance exerts a 95-N force on the person all through the fall, determine out the person's velocity just before hitting the net..
The desired output current is io = 20 mA at a load resistance varying from RL = 20 Ω to 500 Ω. The variation in output current should be kept within ± 3%. Determine the design specifications of the amplifier.
An oscillating LC circuit has a current amplitude of 7.10 mA, a potential amplitude of 250 mV, and a capacitance of 200 nF. What is the maximum energy stored in the capacitor
two parallel plates of area 5 m2 are separated by a distance of 1.0 x 10-5m. they have charges on them of equal
A passenger on a moving train walks at a speed of 1.8 m/s due north relative to the train. What are the magnitude and direction (west of north) of the velocity of the train relative to the ground
A trumpet player is tuning his instrument by playing an A note simultaneously with the first-chair trumpeter, who has perfect pitch. What is the two possible frequencies of the other players note
A boy on the edge of a vertical cliff 20 m high throws a stonehorizontally outward with a speed of 20 m/s. It strikes the grounfat what horizontal distance from the foot of the Cliff
1)Suppose that you start with 2.52×1018 radioactive nuclei and 2.09 h later determine that only 8.14E17 nuclei of the substance remains. What is the half-life of this substance?
Write the first three terms of the sequence whose nth terms are given by
A woman stands on a scale in a moving elevator. Her mass is 53.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
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