3 years ago

It takes 6400 years for one gram of radium to decay away to only 1/16 (one-sixteenth) of a gram. The half-life of radium is

Physics

1 answer:

Vsevolod [243]3 years ago

4 0

1/16........................................

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The flywheel of an engine has moment of inertia 2.50 kg m2 about its rotation axis. What constant torque is required to bring it

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Answer:

Explanation:

From the question we are told that

The moment of inertia is $I = 2.50 \ kg \cdot m^2$

The final angular speed is $w_f = 400 rev/min = \frac{400 * 2\pi}{60} = 41.89 \ rad/s$

The time taken is $t = 8.0 s$

The initial angular speed is $w_i = 0\ rad/s$

Generally the average angular acceleration is mathematically represented as

$\alpha = \frac{w_f - w_i }{t}$

=> $\alpha = \frac{41.89}{8}$

=> $\alpha = 5.24 \ rad/s^2$

Generally the torque is mathematically represented as

$\tau = I * \alpha$

=> $\tau = 5.24 * 2.50$

=> $\tau = 13.09 \ N \cdot m$

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Where are you likely to find a cooling plant located in the ductwork? A. A medium-sized office B. A large factory C. A single fa

Rufina [12.5K]

Answer:

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Explanation:

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3 years ago

A train travels 85 kilometers in 5 hours, and then 63 kilometers in 5 hours what is its average speed?

Lesechka [4]

We know average speed =total distance/time taken
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3 years ago

BRAINLIEST!!!!!

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Answer:

A., an action which causes movement and an opposite reaction

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I don't really know how to explain it, but this helped hopefully! :) Have a bless day

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