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A 2000 kg plane equally accelerates from rest to a launch speed of 300 km/h in 2.0 s. Describe the magnitude of the net force on the plane?
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A skier A going down the ski slope has a speed of 20 m/s at the instant shown and his speed is increasingly uniformly throughout the path at the rate of 1 m/s2. The ski slope is represented by the path y = x3/20 (x,y in meters, measured from O). The skier observes a Frisbee at point B. The Frisbee, as shown, has a speed of 12 m/s and is falling freely under its own weight (neglect air drag). At the instant shown, the position of the Frisbee with respect to the X-Y coordinate system at O is given by the coordinate (-7.5, 15). For this instant,
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An electron is trapped in an infinitely deep potential well 0.300 nm in length. (a) If the electron is in its ground state, what is the probability of finding it within 0.100 nm of the left-hand wall? (b) Identify the classical probability of finding the electron in this interval and state how it compares with the answer to part (a). (c) Repeat parts (a) and (b) assuming the particle is in the 99th energy state.
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Give an example of "the organism environment interaction being two way" with regard to how organisms change planetary chemistry and physics.
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Comet crash On June 30, 1908, a monstrous comet fragment of mass greater than 109 kg is consideration to have devastated a 2000-km2 area of remote Siberia (this impact was called the Tunguska event). Suppose the density of the comet is ρcomet = 5500 kg/m3 and the drag coefficient is 0.50.
Decide the terminal speed of such a comet in air of density 0.70 kg/m3.
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A 15.0 g rubber bullet hits a wall with a speed of 120 m/s. If the bullet bounces straight back with a speed of 92 m/s, what is the change in momentum of the bullet? If the time of contact is 0.02 seconds, what force did the wall provide?
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A loaded tractor trailer with a total mass of 5000 kg travelling at 3.0 km/h hits a loading dock as well as comes to a stop in 0.64 s. Write the magnitude of the average force exerted on the truck by the dock?