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A helicopter, starting from rest, accelerates straight up from theroof of a hospital. The lifting force does work in raising the helicopter. An 810-kg helicopter rises from rest to a speedof 9.0 m/s in a time of 3.5s. During this time it climbs to a height of7.8m. What is the average power generated by the lifting force?
Your cat "Ms" (mass 7.00kg) is trying to make it to the top ofa frictionaless ramp 2.00 m long and inclined upward at 30 degreesabove the horizontal. what is her speed when she reaches the top of the incline
Your car's fan belt turns a pulley at 3.15rev/s . When you step on the gas for 1.60s , the rate increases steadily to 5.95rev/s . What's the pulley's angular acceleration
An ideal transformer's primary has 2000 turns and secondary has 50 turns. The primary is connected to a source of 120 V, Find the current in the secondary
A car with a mass of 1500 kg is traveking directly east at a slow speed of 1.20 mph and eleastically with a smaller car of mass of 1275 kg, Calculate the momenta of the cars before the collision
question1the large quadriceps muscle in upper leg terminates at its lower end in a tendon attached to upper end of the
A cosmic ray proton streaks through the lab with velocity 0.80c at an angle of 55° with the +x direction (in the xy plane of the lab). Compute the magnitude and direction of the proton's velocity
a charge of q is located at the origin while an identical charge is located on the x axis at x 0.60 m. a third charge
A string has a linear density of 5.7 x 10-3 kg/m and is under a tension of 400 N. The string is 1.4 m long, determine frequency of the traveling waves that make up the standing wave
A rotating fan completes 1000 revolutions every minute. Consider a point on the tip of a blade, at a radius of 0.11 m. What is the speed of the point
A parallel-plate capacitor is made from two aluminum-foilsheets, each 4.0 cm wide and 5.00 mlong. What is the capacitance of this capacitor
A cylindrical rod with a diameter of 2.54 cm and a length of 76.2 cm is initially at a temperature of 20.0 C. Next, After reaching equilibrium, what is the volume of the rod
A blacksmith cools a 1.18-kg chunk of iron, initially at a temperature of 650.0?C, by trickling 14.4?Cwater over it. How much water did the blacksmith trickle over the iron
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