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An iron sphere with a mass of 1.5 kg hangs from a 15 cm long spring. If the spring constant is 0.75 N/m what is the period of oscillation when the sphere is pulled down and released?

(A) 3.2 s

(B) 8.9 s

(C) 4.4 s

(D) 12.5 s

The Correct Answer
Explanation

You are tasked with identifying where the stress concentrations may appear on a support beam. Of the following locations which will not have a stress concentration? I Near concentrated loads II. Close to discontinuities of the beam III Where distributed loads occur.

(A) II & III (B) II (C) I & II (D) III

Correct Answer: D

What would the annuity be over a 20 year period that has an interest rate of 10% and a present worth of $500?

(A) $58.75 (B) $42.55 (C) $8.51 (D) $ 63.75

Correct Answer: A

Which of the following can not be equal to 1 mol of the substance at standard conditions?

(A)20 grams of water (B) 6.02 x 1023 molecules of Uranium (C) 28 grams of N2 (D) 22.4 liters on Argon

Correct Answer: A

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