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A discus thrower spins the puck in a circle with radius 80.0 cm. At a certain instant, the launcher is rotating with an angular speed of 10.0 rad / s and the angular speed is increasing to 50 rad / s2. Find the magnitude of the total acceleration.
In a historical movie, two knights on horseback start from rest 88.0 m apart and ride directly toward each other to do battle. Sir George’s acceleration has a magnitude of 0.300 m/s^2, while Sir Alfred’s has a magnitude of 0.200 m/s^2. Relative to Si..
A proton moves in a circular path perpendicular to a 1.19 T magnetic field. Calculate the energy of the proton in eV
A water skier has a mass of 73 kg. Find the magnitude of the net force acting on the skier when she is accelerated from rest to a speed of 13 m/s in 9.4 s
A train at a constant 60.0 km/h moves east for 21 min, then in a direction 62.0° east of due north for 29.0 min, and then west for 56.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and wes..
When light strikes the surface between two materials from above, the Brewster angle is 61.0°. What is the Brewster angle when the light encounters the same surface from below
The counterbalance w1 weighs 100 N. Find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
The lifetime of the first excited state of a hydrogen atom is about 10 ns. What is the uncertainty in energy of the photon emitted when the atom returns to its ground state
Show that the sun is not at rest in the center of the solar system by calculating the distance from the Sun's center to the center of mass of the Sun-Jupiter system
A snowboarder starts from rest and rides 35.23 m down a snow-covered slope that makes an angle of 26.87° with the horizontal and reaches the flat snow near the lift. How far will she travel along the flat snow
A girl of mass 55.0 kg jumps off the bow of a 76.0-kg canoe that is initially at rest. what is the speed of the canoe after she jumps
When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, Estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
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.
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