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Physics: Post your doubts here!

A

_Ahmad

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ashcull14 said:
e.g parachute falling in the air...it initially accelerates because of Weight>air resistance....as air resistance increases its speed begins to decrease...nd as air resistance>weight...the resultant force is in the direction of air resistance so the object accelerates no more and decelerates....the direction of acceleration becomes negative...opposite to the direction of velocity...(resultant force and acceleration in the same direction)
Click to expand...

Thanks alot

can you please solve other Qns too.
 
NamelessIguana

NamelessIguana

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32. Remember the question states that there are 12 wires in parallel, so try again.
33. Use I^2R is equal to Power, and remember to use the Resistence as 6.5 Ohms. And I is 20V/(6.5+1.5).
Hoot hoot brotheraxe. Ask more.
 
NamelessIguana

NamelessIguana

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40. Remember that an Alpha particle reduces the Atomic number by 2 and the mass by 4. So you will first get 223,87. A beta particle, when emitted, increases the number by 1. so Answer is B
 
A

ashcull14

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ashcull14 said:
Q16= W is a single component..while H has 2 components horizontl and vert..so greater mag....T is the greatest as it has balanced W nd H both
Click to expand...
Q32= rmmbr kivchoffs law current entering the junction =current leaving a junction...so I1=I2+I3
Q33=for voltage to vary across a lamp..the potential divider shall be connected in parallel to the bulb..(look at the figures carefully)
 
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