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yuradex [85]
3 years ago
8

scientific endeavor is a purely positive action that does not sometimes cause potentially harmful results.

Physics
1 answer:
Naya [18.7K]3 years ago
6 0
I think that the question is simply asking whether the statement is correct.

The statement is wrong! The scientific endeavor (the work of the scientists, the pursue of knowledge) can be potentially harmful. For example, many tests of human medicine have to be performed on animals, and often the medicine causes great suffering in the animals (and gets rejected for testing on humans).
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1. enhance learning and memory ability in nonhuman organisms.

Explanation:

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3 years ago
Consider a motor that exerts a constant torque of 25.0 N⋅m to a horizontal platform whose moment of inertia is 50.0 kg⋅m2 . Assu
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To solve this exercise it is necessary to apply the concepts related to Work and Kinetic Energy. Work from the rotational movement is described as

W=\tau \Delta\theta

In the case of rotational kinetic energy we know that

KE = \frac{1}{2}I\omega^2

PART A) \theta is given in revolutions and needs to be in radians therefore

\theta = 12rev(\frac{2\pi rad}{1rev})

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Replacing in the work equation we have to

W=\tau \Delta\theta

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W = 1884.95J

PART B) From the torque and moment of inertia it is possible to calculate the angular acceleration and the final speed, with which the kinetic energy can be determined.

\tau = I \alpha

Rearrange for the angular acceleration,

\alpha = \frac{\tau}{I}

\alpha = \frac{25}{50}

\alpha = 0.5rad/s

From the kinematic equations of angular motion we have,

\omega_f^2=\omega_i^2+2\alpha\theta

\omega_f^2=0+2*0.5*24\pi

\omega_f=\sqrt{0+2*0.5*24\pi}

\omega_f = 8.68rad/s

In this way the rotational kinetic energy would be given by

KE = \frac{1}{2}I\omega_f^2

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3 years ago
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Answer:

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Explanation:

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