Consider a solid hemispherical piece, of radius 1, whose point density p (x, y, z) is equal to the distance between the point (x, y, z) and the origin of coordinates. Calculate the mass of the piece. For the resolution of the exercise,

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Consider a solid hemispherical piece, of radius 1, whose point
density p (x, y, z) is equal to the distance between the point (x, y, z)
and the origin of coordinates.
Calculate the mass of the piece. For the resolution of the exercise,
investigate the
spherical coordinates and apply them in the calculation of the
corresponding integral.
2t + 3
r(t)
, In(t² + 2)
t2 + 1
for t> 0. Suppose
describes the position of a particle in the plan
time is measured in seconds and distance in meters.
a) Determine a unitary tangent vector to the displacement of the
particle at time t= 2.
b) Determine the speed with which the particle is moving at the
instant t = 2.
c) What is the acceleration of the particle at the same instant?
Transcribed Image Text:Consider a solid hemispherical piece, of radius 1, whose point density p (x, y, z) is equal to the distance between the point (x, y, z) and the origin of coordinates. Calculate the mass of the piece. For the resolution of the exercise, investigate the spherical coordinates and apply them in the calculation of the corresponding integral. 2t + 3 r(t) , In(t² + 2) t2 + 1 for t> 0. Suppose describes the position of a particle in the plan time is measured in seconds and distance in meters. a) Determine a unitary tangent vector to the displacement of the particle at time t= 2. b) Determine the speed with which the particle is moving at the instant t = 2. c) What is the acceleration of the particle at the same instant?
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