If R(t) Is the Position Vector of a Particle in the Plane

question 35

Multiple Choice

If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.
-Find the acceleration vector.
$\mathbf { r } ( t ) = ( 8 \ln ( 9 \mathrm { t } ) ) \mathbf { i } + \left( 3 \mathrm { t } ^ { 3 } \right) \mathbf { j }$

• A) \(a = - \frac { 8 } { t ^ { 2 } } i + 18 t j\)
• B) \(a = \frac { 8 } { t ^ { 2 } } t ^ { - 2 } i + 18 t j\)
• C) \(a = \frac { 8 } { t } i + 9 t j\)
• D) \(\mathbf { a } = - \frac { 8 } { 9 } \mathrm { t } ^ { - 2 } \mathbf { i } + 18 \mathrm { t }\)

Identify and understand the structural components of the respiratory system.

Describe the functions of different parts of the respiratory system.

Differentiate between various types of epithelia found in the respiratory system.

Understand the functional adaptations of the respiratory system structures.

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