I believe when studying, you should read and study as much information as you can, textbooks, Notes, research, ETC. Studying is for you to put everything you have learned into one.
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Answer:
2440.24 J
Explanation:
Moment of inertia, I1 = 5 kg m^2
frequency, f1 = 3 rps
ω1 = 2 x π x f1 = 2 x π x 3 = 6 π rad/s
Moment of inertia, I2 = 2 kg m^2
Let the new frequency is f2.
ω2 = 2 x π x f2
here no external torque is applied, so the angular momentum remains constant.
I1 x ω1 = I2 x ω2
5 x 6 π = 2 x 2 x π x f2
f2 = 7.5 rps
ω2 = 2 x π x 7.5 = 15 π
Initial kinetic energy, K1 = 1/2 x I1 x ω1^2 = 0.5 x 5 x (6 π)² = 887.36 J
Final kinetic energy, K2 = 1/2 x I2 x ω2^2 = 0.5 x 3 x (15 π)² = 3327.6 J
Work done, W = Change in kinetic energy = 3327.6 - 887.36 = 2440.24 J
Immediately after the declaration of the independence of the state of Israel, the five Arab countries jointly attacked Israel.
<h3>What is the state of Israel?</h3>
The state of Israel is one one of the countries that exists in the middle east. The country is surrounded by five Arab nations namely; Egypt, Jordan, Iraq, Syria, and Lebanon.
Immediately after the declaration of the independence of the state of Israel, the five Arab countries jointly attacked Israel.
Learn more about Israel:brainly.com/question/9279902
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Answer: The answer is the first one and the last one.
Explanation: If an account cost $1 and each song is 1.5x. It has to be less than or equal to 25. So it would be $1 for (the account plus) 1.5x for (how many songs he buys) is less than or equal to 25 (the ammount on the gift card).
