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Gemiola [76]
3 years ago
11

A circular disc with a radius of gyration of 200 mm and a mass of 15 kg is rotating in the clockwise direction with an angular v

elocity of 5 radians per second. From the time t=0 seconds if the disc is subjected to a counterclockwise moment of 9t, where t is the time in seconds, deternmine the direction and magnitude of angular velocity of the disc at time t=10 seconds.

Engineering
1 answer:
True [87]3 years ago
8 0

Answer:

ωf = -2995 rad/s    (counterclockwise)

Explanation:

See it in the pic

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What is the thermal energy contained within a cubic kilometre of granite (in barrels of oil equivalent) for every one degree cha
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Answer:

348643.34 barrels of oil

Explanation:

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Now,

The thermal energy stored is given as;

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or

the mass of 1 km³ of granite = 2700 × 1000³ = 27 × 10¹¹ Kg

therefore,

Thermal energy = 27 × 10¹¹ × 790 × 1

or

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hence,

the thermal energy in terms of barrels of oil

= Total thermal energy / Energy stored in 1 barrel of oil

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