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A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. She has a mass of 60.0 kg and he a mass of 76.0 kg , and they start from rest 15.0 m apart. A) Find his initial acceleration. B) Find her initial acceleration. C) If the astronauts' acceleration remained constant, how many days would they have to wait before reaching each other? (Careful! They both have acceleration toward each other.)
An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0o with the horizontal. How fast is she going just before she lands
A model airplane with mass 0.743 kg is tethered to the ground by a wire so that it flies in a horizontal circle 29.7 m in radius. The airplane engine provides a net thrust of 0.810 N perpendicular to the tethering wire.
An arrow is shot horizontally from a height of 4.9 metersabove the ground. The initial speed of the arrow is 45m/s.Neglecting friction, how far will the arrow fly before hitting the ground
directed into the plane of the computer screen as shown in the figure. Identify the magnitude and direction of the resultant magnetic field at P.
An airplane flies in a loop (a circular path in a vertical plane) of radius 150m . The pilot's head always points toward the center of the loop, What is the apparent weight of the pilot at this point
A ball of circumference 72.7 cm and mass 605 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, Calculate the buoyant force on the ball
A thing rod of mass M and lenght l is suspended from a frictionless pivot at its upper end. How high does the bottom of the rod swing
questiona 20 kg floodlight in a park is supported at an end of a horizontal bean of negligible mass that is hinged to a
A resistance R and a 1.5-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
A train is traveling at 30.0m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262Hz . The speed of sound in air should be taken as 344m/s . What frequency f approach is heard by a passenger on a tra..
A novice skier, startingfrom rest, slides down a frictionless 35 o incline whosevertical height is 125 m. How fast is she going when she reaches the bottom
Approximately how many volts above the threshold voltage is the normal operating voltage of the Geiger tube, and why is the operating voltage selected this way?
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