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
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...
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...
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!
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...
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...
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...
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...
Homework Statement
Two blocks are stacked one on top of the other with mass m1 on top and m1/m2= 3.0. There is no friction between m2 and the ground, but the coefficient of friction between m1 and m2 are given by μk= 0.40 and μs= 0.50. For what magnitudes of force acting horizontally on m1 do...
Homework Statement
Find the local maximum and minimum values and saddle points of the function
f(x,y) = x^2 + xy + y^2 + y
Homework Equations
Local max/min
critical points
saddle
The Attempt at a Solution
1) partial derivative: fx = 2x+y fy = x+2y+1
from here, i'm a little confuse on...
Homework Statement
A 6.64-g bullet is moving horizontally with a velocity of +340 m/s, where the sign + indicates that it is moving to the right. The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through...
Homework Statement
On a banked race track, the smallest circular path on which cars can move has a radius of 116 m, while the largest has a radius of 153 m, as the drawing illustrates. The height of the outer wall is 11.6 m. Find (a) the smallest and (b) the largest speed at which cars can move...
Homework Statement
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the...
Would the height of the (a) be 1.40 m + x since the height of the ramp is 1.40 m above the ground? Also, i'm a little confuse on how to find the magnitude of this problem.
Homework Statement
A skateboarder shoots off a ramp with a velocity of 5.30 m/s, directed at an angle of 52.0° above the horizontal. The end of the ramp is 1.40 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point...