Qualification > Sciences
Physics
Aishath:
Hey can someone tell me the answer for Oct/Nov 2007 ppr 1 ques. 8?
Nd y is it that answer?
Ghost Of Highbury:
its is "C"
because u draw a perpendicular line and drop it from point C
u will notice that it has not crossed the base line and therefore it has not toppled yet
whereas it does from point A,B and D
:)
astarmathsandphysics:
Fuses
blow if there is a short cicuit. They are connected in the live wire -brown or red- on the way to the unit. Then for example when a cable inside the a electric unit touches a metqal case the case can become live and give a shock to any person touching the case. To stop this the fuse blows as soon as any live cable touches the case then current is not allowed to reach the unit.
They come in various sizes 3A, 13A for example. The fuse should not blow if there is a normal operating current flowing. If a unit demands a 3A current, fit a 5A fuse
Aishath:
umm. i so sorry bt i am really bad at finding centre of mass :(
Wat is base line?? and draw perpendicular to wat? the tables?
Ghost Of Highbury:
find the attached diagram
notice that the red line (perpendicular) dropped from point C doest not exceed/ cross the blue line (base of the glass)
whereas for the rest of the points , it does
(if the perpndicular from the center of mass crosses the base line => the object topples)
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