# Recent content by Physicsnoob90

1. ### Finding net electric force

i was wondering why my initial numbers were looking correct but still getting the wrong result.
2. ### Finding net electric force

You're right. I got +372 N total as my result (which came back correct!) Thank You!
3. ### Finding net electric force

Did you use the same number/equation as well? F(net(q1,3))= k(q1 *(3.0)(q3))/2(d)^2 = - ( (9.0e^9 N m^2/C^2) * 20e^-6 C * (3.0)(20e^-6 C) )/ 2 (0.11 m)^2 = - 446.3 N
4. ### Finding net electric force

i'm using +q(1,2) going right and -q(1,3) going left. I still get -446.281 N in the second force
5. ### Finding net electric force

Homework Statement Given that q = 20 µC and d = 11 cm, find the direction and magnitude of the net electric force exerted on the point charge q1 below. Homework Equations F(elect) = k (q1,q2)/d^2 The Attempt at a Solution 1. after converting each unit to its appropriate form, F(net...
6. ### Chemistry Question -- Opening a valve between two containers...

Homework Statement Two closes containers are connected by a valve, which initially separates the containers from each other. C Container A has 8.00 L of H2 at 3.00 atm and temperature 400 k. Container B has 6.00 L of O2 at 4.00 atm and temperature 400 k The valve is opened, the gases mix, and...
7. ### Implicit function

would i be able to find L by square rooting (w,h,ℓ) and then multiplying it with the 2? update: i manage to figure out the equation by doing just that. Thanks for your help!
8. ### Implicit function

Homework Statement The length ℓ, width w, and height h of a box change with time. At a certain instant the dimensions are ℓ = 4 m and w = h = 9 m, and ℓ and w are increasing at a rate of 1 m/s while his decreasing at a rate of 6 m/s. At that instant find the rates at which the following...
9. ### Finding time of a rocket

Homework Statement A model rocket takes off from ground level accelerating upward at a = 3.0 g. This upward acceleration lasts for a time τ = 15 s. Afterward the rocket continues upward, eventually stops rising, then falls back to the ground. How much time passes from the initial upward...
10. ### Vectors quantity

isn't the other vector the opposite diagonal to A+B?
11. ### Vectors quantity

So would creating a new vector like vector C = A+B?
12. ### Vectors quantity

i thought it was asking to add the components of the vector A and B while also figuring out the quantity |A+B|^2 - |A-B|^2?
13. ### Vectors quantity

they are vectors
14. ### Vectors quantity

Homework Statement Vector A has magnitude A = 4.0 units and is directed θA = 15◦ counterclockwise from the positive x-axis. Vector B has magnitude B = 4.0 units and is directed θB = 85◦ counterclockwise from the positive x-axis. Determine the following quantity: |A + B|^2 − |A − B|^2...
15. ### Rotation acceleration

Homework Statement A disk of radius 16 cm rotating around a fixed axis at its center is accelerated from rest to an angular velocity of +13rev/min in +0.27 rev. (A )Find the angular acceleration (in rad/s^2), which is assumed to be constant, during this time interval. (B) what is the total...