Search found 38 matches

by SINAN EXPERT
Sat May 18, 2019 5:54 pm
Forum: Algebra
Topic: 0^0=1!
Replies: 5
Views: 4724

Re: 0^0=1!

samiul_samin wrote:
Thu May 16, 2019 10:36 am
Why $64\times 0^0=64$?
$2^6=(2+0)^6⇒64=64*0^0$
by SINAN EXPERT
Sun May 12, 2019 4:26 pm
Forum: Social Lounge
Topic: Share your AoPS id name
Replies: 5
Views: 3559

Re: Sharing my AoPS id name

M. M. Fahad Joy wrote:
Fri May 10, 2019 5:55 am
Then, you are that sinan export!!! :lol:
Wait....who is the EXPORT? :lol:
by SINAN EXPERT
Fri Apr 26, 2019 8:55 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/2
Replies: 3
Views: 2621

Re: BdPhO Regional (Dhaka-South) Higher Secondary 2019/2

Solution:
BdPhO Regional (Dhaka-South) Higher Secondary 2019(3S).png
BdPhO Regional (Dhaka-South) Higher Secondary 2019(3S).png (18.56 KiB) Viewed 2614 times
by SINAN EXPERT
Fri Apr 26, 2019 5:25 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) : Problemsets
Replies: 0
Views: 4297

BdPhO Regional (Dhaka-South) : Problemsets

$***BdPhO$ $Regional$ $(Dhaka-South)$ $: Higher$ $Secondary***$ $Problem-1$ A coherent beam of monochromatic light of wavelength $500$ $nm$ is directed towards two thin slits separated by a distance of $1$ $mm$. If the screen covers an angular region of $60˚$, as shown in the figure, approximately ...
by SINAN EXPERT
Fri Apr 26, 2019 5:18 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/Bonus
Replies: 0
Views: 4206

BdPhO Regional (Dhaka-South) Higher Secondary 2019/Bonus

At the Large Hadron Collider Many particle physics experiments are carried on one of two types of accelerator facilities, (a) colliders in which equal energy particle collide head on, i.e. their momentum vectors point in opposite direction, (b) “fixed target facilities”, where an energetic beam par...
by SINAN EXPERT
Fri Apr 26, 2019 4:54 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/6
Replies: 0
Views: 4148

BdPhO Regional (Dhaka-South) Higher Secondary 2019/6

Litu is trying to balance one egg on another egg, which rests on a table. He does it by taking an empty cylindrical plastic cup. The cup is inverted and put over the two eggs, so that the inner wall of the cup prevents the upper egg from falling down on the table. Figure out the condition for the ma...
by SINAN EXPERT
Fri Apr 26, 2019 4:53 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/5
Replies: 0
Views: 4069

BdPhO Regional (Dhaka-South) Higher Secondary 2019/5

Imagine a rocket with mass $M$ is moving toward a gas cloud with initial velocity $v$. Naturally the rocket will be colliding with the gas particles and gradually losing its kinetic energy. Now for the sake of simplicity, we can model this gas cloud as tiny particles with very small mass $m$ and den...
by SINAN EXPERT
Fri Apr 26, 2019 4:50 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/4
Replies: 0
Views: 4173

BdPhO Regional (Dhaka-South) Higher Secondary 2019/4

BdPhO Regional (Dhaka-South) Higher Secondary 2019(3).png Assume we have a long column of water and an air bubble of radius $r$ and pressure $P_0$ at the surface of the Earth is rising inside that. If the column is long enough for $g$ not to be considered constant, find $r$ as a function of $R$ ; w...
by SINAN EXPERT
Fri Apr 26, 2019 4:44 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/3
Replies: 0
Views: 4212

BdPhO Regional (Dhaka-South) Higher Secondary 2019/3

A large loop of radius $R$ carries a current of $I$. A much smaller loop of radius $r$ is placed at the center of this loop, such that its axis is perpendicular to that of the larger loop. The smaller loop carries a much smaller current $i$. What is the torque on the smaller loop?
by SINAN EXPERT
Fri Apr 26, 2019 4:43 pm
Forum: Physics
Topic: BdPhO Regional (Dhaka-South) Higher Secondary 2019/2
Replies: 3
Views: 2621

BdPhO Regional (Dhaka-South) Higher Secondary 2019/2

BdPhO Regional (Dhaka-South) Higher Secondary 2019(2).png
BdPhO Regional (Dhaka-South) Higher Secondary 2019(2).png (6.55 KiB) Viewed 2621 times
Consider a conducting sphere with charge $+q$ and a point charge $-q$ kept as shown in the figure. Draw electric field lines.