Recent content by aMo0oDi

power has two equations : 1) P(t)= W/t = -PE/t = q.V/t = I.V 2) P= I (I.R)

What is the efficiency of a 265W motor that draws 4.30A from 120V line? How much energy in Joules does this motor use in 1.50 hour? thanks in advance..

thanks a lot.. i appreciate your help :)

actually, i don't know how you get x + 1/x.. i can calculate its derivative though.. please explain the way the you got x + 1/x.. thanks..

i'm kind of lost here, i need a full answer

new calculus problem.. HELP! Hi there... i need a help with this question as soon as possible... Find a positive number such that the sum of the number and its reciprocal is as small as possible..?

i got 1.01 m/s is that correct .. I did it by using x^2+y^2= z^2 x=8 y= 2 i found the hyp as equal to 8.24 m b soo i used it to get the time which is 7.5 s T=d/s T=12/1.6 then i used the time with the hyp to get the speed . which is s=d/t 8.24/7.5 = s im wondering is...

2) a spotlight on the ground shines on a wall 12 meters away. if a man 2 meters tall walks from the spotlight toward the building at a speed of 1.6 meter per second, how fast is the length of his shadow on the building decreasing when he is 4 meters from the building?

thanks a lot for helping us figuring out the way of solving the first problem.. what about the second one?

Hi guys.. i was studying calculus and i found some problems in solving these two questions.. would you please help me to figure out the answers? 1) At noon ship A is 150 km west of ship B. Ship A is sailing East at 35 km/h and ship B is sailing North at 25 km/h. How fast is the dstance...