Recent content by jin

whoops i mean omega/(2*PI)

frequency=omega/2*PI where omega=sqrt(K/m) u find K. m is mass. hope that makes sense

for #2 i didn't get part a...i just found the amplitude using A = sqrt((x^2) + ((v^2)/(w^2)) but i heard I'm suppose to be solving for y? the others I'm just totally confused @@

1. A 4.0kg block is suspended from a spring with force constant of 500N/m. A 50g bullet is fired into the block from directly below with a speed of 150m/s and is imbedded in the bloack. (a) Find the amplitude of the resulting simple harmonic motion. (b) What fraction of the original kinetic...

thanks! can u help me with the others on another post?? please ><

so...i just go 120/400 x 100? how do i calculate th heat rejected in the cycle?? the left over? 400-120??

heat system efficiency?? So lost..so what am i suppose to do?? 'An engine absorbs 400J of heat and does 120J of work in each cycle' a)what is its efficiency? b)how much heat is rejected in each cycle?

thermal expansion? I need help asap! the question goes like this... A cubic metal ox with sides of length 20cm contains air at pressure of 1 atm and a temperature of 300K. the box is sealed so that the volume is constant and heated to 400K. what is the net force on each side of the box...