May i know how do i eliminate C and D and how do i obtain the last two equations? Are there skipping of steps in between 4th to 5th equation? What are the intermediate steps that i should take to transit from 4th equation to the 5th equation?
Homework Statement
https://pasteboard.co/Hj3g5Km.jpg
When both switches 1 and 2 are closed,what is the total resistance of the set up? I couldn't figure out which resistors are connected in parallel and which resistors are actually in series in this set up when both swtiches are closed. I...
Homework Statement
Homework Equations
V=IR R=ql/A
The Attempt at a Solution
I chose option A as current prefers to flow through the path of least resistance.
ive tried,there is a (m+1/2)λ which makes my elimination of m isn't possible(at least for me)..
i tried squaring both sides for equation(2) which ends up with a m^2*λ^2 + mλ^2 ...
here's my attempt:
initial centre of mass:
{(460*5.5)+(9.0*0)+(7.0*11)/460+9.0+7.0=5.477m
final centre of mass:
(460*5.5)+(9.0*0)+(7.0*x)/460+9.0+7.0 = (2530+7x)/476
if i try to solve it using conservation of momentum, there is still an unknown- time taken for the cat to complete its journey..
Homework Statement
A car and a train collides with each other in an elastic collision. The mass of the train is much more larger than the mass of the car. Ignore air resistance and friction from the railway tracks and roads.
Just before impact the car has a velocity of (V) train has a velocity...
Homework Statement
A dog and a cat, are standing at opposite ends of a uniform log that is floating in a lake. The log is 11.0m long and has mass 460kg . The dog has mass 9.0kg and the cat has mass 7.0kg . Initially the log and the two pets are at rest relative to the shore.The cat then begins...
ok,i tried this solution
let f(x)=a(x^2)+bx+c
(a(x^2)+bx+c)*(a(x^2)+bx+c) =(x^4)-4(x^2)+2
comparing the coefficient of x^2
2c+b^2=-4 ---eqn(2)
comparing the coefficient of constant,
i get a c value of sqrt2 and -sqrt2
which i try to fit into eqn(2) but dosent work out..
Homework Statement
http://postimg.org/image/48919pl1x/
Homework Equations
f(f(x))= (x^4)-4(x^2)+2,
The Attempt at a Solution
[f(x)]^2=
(x^4)-4(x^2)+2=
[(x-2)^2]-(4x^2)+2
i can't seem to square root (x^4)-4(x^2)+2...
Homework Statement
A ball rolls around a horizontal circle at height y inside the cone shown below. Find an
expression for the ball’s speed in terms of r(radius of cone),x(height of cone),p and g(9.81ms^-2).
Homework Statement
r(radius of cone),x(height of cone),p and...
neglecting friction from the slope and air resistance,
what are the possible forces acting on the ball?
i can only think of 2:
gravitational force by the Earth on the ball.
normal force exerted by the slope on the ball.
are there any other forces else that i missed out?
A 10g mass is suspended from a string and immersed in a beaker of liquid(Weight of beaker and liquid = 500g). A boy hold the string with his hand not letting the 10g mass touch the bottom of the beaker. (let upthrust generated by mass be X Newton.)
Qn: what would be the reading on the...