Flux across a sphere Consider the radial field F = 〈 x , y , z 〉 and let S be the sphere of radius a centered at the origin. Compute the outward flux of F across S using the representation z = ± a 2 − x 2 − y 2 for the sphere (either symmetry or two surfaces must be used).
Flux across a sphere Consider the radial field F = 〈 x , y , z 〉 and let S be the sphere of radius a centered at the origin. Compute the outward flux of F across S using the representation z = ± a 2 − x 2 − y 2 for the sphere (either symmetry or two surfaces must be used).
Flux across a sphere Consider the radial field F = 〈x, y, z〉 and let S be the sphere of radius a centered at the origin. Compute the outward flux of F across S using the representation
z
=
±
a
2
−
x
2
−
y
2
for the sphere (either symmetry or two surfaces must be used).
A net is dipped in a river. Determine the flow rate of water across the net if the velocity vector field for the river is given by
v = (x - y, z + y + 6, z? ) and the net is decribed by the equation y = 1 – x - z', y 2 0, and oriented in the positive y-
direction.
(Use symbolic notation and fractions where needed.)
· dS =
Incorrect
A sodium ion (Na+) moves in the xy-plane with a speed of 2.90 ✕ 103 m/s. If a constant magnetic field is directed along the z-axis with a magnitude of 3.25 ✕ 10−5 T, find the magnitude of the magnetic force acting on the ion and the magnitude of the ion's acceleration.
HINT
(a)
the magnitude (in N) of the magnetic force acting on the ion
N
(b)
the magnitude (in m/s2) of the ion's acceleration
m/s2
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