Physics, 08.07.2019 17:30, ponylover9655
The work w done in moving an object from (0,0)(0,0) to (13,4)(13,4) subject to a constant force ff is w=f ⋅rw=f ⋅r, where rr is the vector with its head at (13,4)(13,4) and tail at (0,0)(0,0). the units are feet and pounds. (a) suppose the force f=8cosθi+8sinθjf=8cosθi+8sinθj. find ww in terms of θθ. (b) suppose the force ff has magnitude of 55 lb and makes an angle of π6π6 rad with the horizontal, pointing right. find ww in foot-pounds. (use symbolic notation and fractions where needed.)
Answers: 2
Physics, 21.06.2019 23:00, ImBADatmath8743
Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm
Answers: 2
Physics, 22.06.2019 13:30, sukiyoshi10
Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)
Answers: 1
The work w done in moving an object from (0,0)(0,0) to (13,4)(13,4) subject to a constant force ff i...
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