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guapka [62]
3 years ago
9

1) An ice skater with a moment of inertia of 2.2 kg m^2 rotates at a frequency of 0.8 rotations per second. The ice skater tucks

his/her arms and legs in to achieve a final frequency of 1.5 rotations per second. Find the final moment of inertia of the ice skater.
Physics
1 answer:
trapecia [35]3 years ago
4 0

Answer:

Explanation:

2.3 kg·m/s²

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Read 2 more answers
Convert 34.2 m/s into km/min. HELP
Vlad1618 [11]

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Explanation:

given data= 34.2 m/s

we have to convert it into km/s

as we know that

1 km=1000 m

so 1 m= 1/1000 =0.001 km

now we know that 1 min=60 sec

                              so 1 sec=1/60= 0.016 min

therefore  

34.2m/s = 34.2*m/sec =34.2*0.001 km /0.016 min

so 34.2 m/s =2.1 km/min

5 0
3 years ago
​For the "determine data needs" activity of a project, the optimistic estimated duration is 10 days, the pessimistic estimated d
Katena32 [7]

Answer:

This is a PERT  (Program Evaluation and Review Technique) question and the expected duration of completing this activity can be solved using the formula below.

 Pert Expected Duration Estimate = ║Optimistic Duration + (4 x Most Likely Duration) + Pessimistic Duration║/6.

15 days = Most likely Activity Duration.

10 days = Optimistic Activity Duration

20 days = Pessimistic Activity Duration

Substituting these values, we will have

(10 +(4 X 15) +20)/6. The pert estimate is therefore calculated as 15 days

The expected duration of completing this activity = 15 days.

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