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A rotating uniform cylindrical platform of mass 250kg and radius 5.9m slows down from 4.0rev/s to rest in 17 s when the driving motor is disconnected.
Estimate the power output of the motor () required to maintain a steady speed of 4.0rev/s?
Water falls without splashing at the rate of 0.210 L/s from a height of 3.90m into a 0.590 kg bucket on a scale. If the bucket is originally empty, what does the scale read 4.00 s after water starts to accumulate in it.
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
A projectile is fired in such a way that its horizontal range is equal to 7 times its maximum height. What is the angle of projection
An inclined plane has a height of 0.383 and is 120 cm long. What is the KE energy at the end of the ramp
After collision, the component of the total momentum parallel to the floor must remain zero, since the net external force acting on the plate has no component parallel to floor.find out the masses of pieces 1 and 2.
What is the magnitude and direction of the net force on the box?
Two identical, small insulating balls are suspended by separate 0.31-m threads that are attached to a common point on the ceiling. determine the tension in the threads
A meteoroid is speeding through the atmosphere, traveling east at 21.5 km/s while descending at 19.0 km/s. What is its speed, in km/s.
The partial pressures of gas A and gas B, respectively, are 0.238 atm and 0.779 atm. If 0.220 mol a third gas is added with no change in volume or temperature, what will the total pressure become?
A person desires to reach a point that is 3.40 km from her present location and in a direction that is 350 north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she mi..
This question will ask you to determine the area of a flat piece of metal according to the data in the table below. etermine the mean, standard deviation, and the standard deviation of the mean for the width measurements
Your airplane is caught in a brief, violent downdraft. To your amazement, the pretzels on your seatback tray rise vertically, What's the downward acceleration of the plane
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