Recent content by lcp1992

i think kureji said that the height and weight are given so if the weight is given you can calculate mass from the formula weight=(mass)(gravity)

Are seismic prospecting and seismic profiling related? or do they mean the same?

Does somebody know what is seismic prospecting? and where can I find more info about it

Can anybody tell me which are the formulas to find energy in capacitors in series and in parallel?

b]1. Homework Statement [/b] A 5kg mass is suspended from a cord. The mass is held as shown with a horizontal 23N force. Find the angle Homework Equations Fnet=ƩFi=0 The Attempt at a Solution I am not sure about the right way to find the angle but the variables given are force and the...

thanks!

I got it but I am still confused so the work is total energy input and the energy is the useful energy , why?

thanks!

Homework Statement A 150kg cart moving at 13m/s east collided with a 420kg wagon moving at 5m/s east.The cart rebounded westward with a speed of 3m/s. What was the speed of the wagon after the collision? Homework Equations m1v1+m2v2=m'1v'1+m'2v'2 The Attempt at a Solution I...

0.63 is the efficiency

Iused the mgh formula, but I couldn't get the answer which is 0.63

Homework Statement Joe ascends a small hill from an elevation of 250m to an elevation of 490m. In doing so he expends 2.8x10^5J. If Joe's mass is 75kg what is the efficiency of his climb? Homework Equations W= change in E= change in Ek + change in Ep Ep= mgh Ek= 0.5mv^2...