Question: 3. A mass is suspended by a spring such that it hangs at rest 0.5 m above the ground. The mass is raised 40 cm

3. A mass is suspended by a spring such that it hangs at rest 0.5 m above the ground. The mass is raised 40 cm and released at time t = 0 s, causing it to oscillate sinusoidally. If the mass returns to the high position every 1.2 s, determine the height of the mass above the ground at t = 0.7 s. Draw a sketch. 1.2 -0.8 0.4 0 0.2 0.4 0.6 0.8 1.0 -0.4 /7 marks 4. On a busy construction site at 1:00 p.m. the sound level is 124 dB, while at 4:00 p.m. it is 100 dB. How many times as intense as the sound of the construction site at 4:00 p.m. is the sound at 1:00 p.m

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