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
Answer:
D) conveys unique qualities about a student
Explanation:
A good letter of recommendations would have a lot of good things about the student, so it would be more than a page long.
Schools want to hear good things about students, so it would D.
You need to make at least the minimum payment each month, even during an interest-free period. Set up a Direct Debit for the full monthly balance, or for as much as you can afford to repay. This will mean you don’t miss a payment, which could lead to unwanted charges and the loss of any introductory rate. Missing payments could also damage your credit rating.
You’ll have a credit assessment by the card provider when you apply, which will usually include checking your credit reference file. A good credit rating will improve your chances of a successful credit application. It could also give you access to cards offering the lowest interest rates and/or promotional offers.
You need to be at least 18 to apply for a credit card. With some cards the minimum age is 21.
C. Come to a complete stop begin the stop line
