Physics, 03.12.2019 02:31 wrightdarius78
A45 kg boy runs at a rate of 2.5 m/s and jumps on top of a stationary skateboard that has a mass of 4 kg. after jumping onto the board, the boy and the board travel off together. assuming that momentum is conserved, what is the final speed of the boy and the board?
Answers: 1
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Which term best describes the phrase “something that happens”?
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Physics, 22.06.2019 12:10, davidoj13
Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f
Answers: 2
Physics, 22.06.2019 17:00, StupidFatChipmunk
What equation is used to calculate the weight of an object on a plant ?
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Physics, 23.06.2019 07:50, yedida
In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj.
the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.
Answers: 2
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