How many times faster is the speed you found
Fast trip. Suppose you want to reach Alpha Centauri in 100 years. A. How fast would you have to go?, in km/hr? B. How many times faster is the speed you found in (a) than the speeds of our fastest current spacecraft (around 50,000 km/hr)?
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A person of mass 72 kg stands at the center of a rotating merry-go-round platform of radius 2.8 m and moment of inertia 930 kgcdot m^2. The platform rotates without friction with angular velocity 2.0 rad/s. The person walks radially to the edge of
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Calculate the work done in lifting a 560 N barbell 1.6 m above the floor? What is the potential energy of the barbell when it is lifted to this height?
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We have seen that "myths" often functioned in early cultures as "distantly recalled memories" of actual events. For example, the stories of the Minotaur, Atlantis, and the Trojan War have some basis in historical facts, even though the details are gr
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A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up with speeds v1 = 0.630 m/s and v2 = 1.40 m/s. Negl
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