Khadija Brohi
Khadija Brohi voted up Oddman's answer
Unless the boy is on another planet, the problem as stated makes no sense. With Earth's gravity (a=-9.8m/s^2) being the only influence on the ball, at the end of 3 seconds it will be   h = v0t - (1/2)at2 = 20(3) - (1/2)(9.8)(3^2) = 15.9 meters above where it was thrown from. The surface … Read more
Khadija Brohi
Khadija Brohi commented on Oddman's answer
Thank-you so much sir. But still I am not able to understand how this "d(load power)/dRl = Vs^2*(Rs-Rl)/(Rs+Rl)^3" has been differentiated and how you concluded Rs = Rl..
Khadija Brohi
Khadija Brohi voted up Oddman's answer
You need to be a little careful in your thinking about this and in the terminology you use to describe the situation. In a two-terminal linear circuit that can be modeled by a constant supply voltage source (Vs) and a constant source impedance (Rs), the maximum power dissipation will occur when the two terminals are … Read more
Khadija Brohi
Khadija Brohi voted up Oddman's answer
750W/240V = 3.125A A 1A or 3A fuse would be too small. If the fuse is in the iron, a 5A fuse might be appropriate. _____ The correct size of a fuse depends on what the fuse is intended to do. In house wiring, the fuse is intended to protect the wiring and to reduce … Read more
Khadija Brohi
Khadija Brohi voted up Oddman's answer
With the side of one foot pressed against the wall, you cannot get your center of gravity over that foot, especially so if you lift your leg in a direction that is out from the wall. If you have a very wide foot, you may be able to turn your leg so your body (chest … Read more