an object oscillates as it moves along the x-axis. it's displacement varies with time according to the equation x=4sin (pi t + pi/2) where t=time in seconds and x= displacement in meters what is the displacement between t=0 and t=1second?

If 1 lb of fat is stored by the body for each 14.6×103kj of excess nutritional energy consumed, how long will it take this person to gain 1 lb?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

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