actually...i js noticed your second point... both charges act in the same direction so the null point can't be inbetween the charges.
But why have you ignored the negative sign ??
Homework Statement
Two charges of value +4C and -16C are separated by a distance of 3m.
At what spot along the line is the electric field is zero?
Homework Equations
I tried using the equation E = Q / 4pieE(o)r^2
The Attempt at a Solution
I get a quadratic equations which...
Homework Statement
If I was to work out the sum of all the even numbers between 1000 and 2000, am I correct in saying that there are exactly 600 even numbers?
Therefore, is the final answer 959400?
Could someone please confirm this?
Thank you.
Homework Equations
Sum = n/2[(2a+(n-1)d]...
Ok. I gave it a little thought and worked it out. The volume of the obserbavle universie is 9.73E78 m^3.
But the question carries on. It goes:
A beach is 1km long, 10m across, and 1m deep. One sand grain occupies 1cubic mm. which is the larger number:
The number of stars in the...
This question seems simple but I cannot recall the formula to solve it. I hope someone can help me:
If the age of the universe is 1.4E10 years, estimate the volume of the observable universe?:confused:
Urgent help required.
A particle is projected on a horizontal ground and moves freely under gravity.
The horizontal and vertical components of the initial velocity are 2u and u ms^1 respectively.
The ball lands a distance 80m from the point of projection.
Show that u=14
This is what I did:
Taking motion...
This question has been bothering me for time.
How does a moving bicycle manage to stay upright? but when it slows down it tends to fall to a side.
Can someone please explain?
Can someone please explain to me how to start off this question?
A uniform semicircular lamina has mass M. A is the midpoint of the diameter and B is on the circumference at the other end of the axis of symetry. A particle of mass m is attached to the lamina at B. The centre of mass of the...