Potential energy of the barbell
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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The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 1.96 T magnetic field is directed perpendicular to the plane of the circuit.
"Explain what that advantage is. What is your advantage when you trade for those goods and services you do not have an absolute advantage in?
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
A company is planning a party for its employees. The organizers of the party want it to be afun party, so they have assigned a â??
Calculate the current density, J, due to the gravitational drift of electrons and protons, where the gravitational acceleration, g, is along the negative z-axis.
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)?
A proton has a mass of 1.67 x 10^-27 kg and a charge of 1.60 x 10^-19 C. What is the gravitational force on a single proton at Earth's surface?
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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