Aguitar string produces 3 beats/s when sounded with a 350-hz tuning fork and 8 beats/s when sounded with a 355-hz tuning fork. what is the vibrational frequency of the string? explain your reasoning.

347 Hz

Explanation:

Let the vibrational frequency be f.

so, f = 350 + 3 or 350 - 3 = 353 Hz or 347 Hz

And

f = 355 + 8 or 355 - 8 = 363 Hz or 347 Hz

So, 347 is common in both the cases,

Thus, the vibrational frequency is 347 Hz.

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.