Question

A certain string on a piano is tuned to produce middle C (f = 261.3 Hz) by carefully adjusting the tension in the string. For a fixed wavelength, what is the frequency when this tension is doubled?

Select one:

a. 446.63 Hz

b. 130.08 Hz

c. 185 Hz

d. 370 Hz

A mass of 1.53 kg is attached to a spring and the system is undergoing simple harmonic motion with a frequency of 1.95 Hz and amplitude of 7.50 cm. What is the total energy of oscillation?

Select one:

a. 0.844 J

b. 0.646 J

c. 9.95 J

d. 0.633 J

A microwave oven has a 15-cm radius rotating plater for even cooking. The plate accelerates from rest at a uniform rate of 0.87 rad/s² for 0.50 s before reaching a constant operating speed. How many revolutions does this plate make before reaching its operational speed?

Select one:

a. 0.09 rev

b. 0.65 rev

c. 0.11 rev

d. 0.02 rev

Answer 1