Question

An oscillator makes 720 vibrations in 3 minutes.

Answer 1

Answer:

Below :)

Explanation:

A) 720/3 =240.  40 per minute.

B)  720/180 = 4 per second.

C)  T=1/4 s^-1 (the formula) = 1/4 s. (The time peroid.)

D)  V=1/T

     V= 4 Hz

Answer 2

$\qquad\qquad\huge\underline{{\sf Answer}}$

An oscillator makes 720 vibrations in 3 minutes. so, we have to solve the given problems based on it ~

#1. what's the number of vibrations per minute •

$\qquad \sf \dashrightarrow \: 3 \: min = 720 \: vib$

$\qquad \sf \dashrightarrow \: 1 \: min = \dfrac{720}{3}$

$\qquad \sf \dashrightarrow \: 1 \: min = 240 \: vib$

#2. Calculate unit vibrations per second •

$\qquad \sf \dashrightarrow \: 1 \: min = 240 \: vib$

$\qquad \sf \dashrightarrow \: 60 \: sec = 240 \: vib$

$\qquad \sf \dashrightarrow \: 1 \: sec = 4 \: vib$

#3. What's it's time period •

time taken to do 1 vibration is known as a period, so we can infer that :

$\qquad \sf \dashrightarrow \: 1 \: vib = \dfrac{1}{4} \: sec$

$\qquad \sf \dashrightarrow \: t = 0.25 \: sec$

#4. what is it's frequency in hert •

$\qquad \sf \dashrightarrow \: f = \dfrac{1}{t}$

$\qquad \sf \dashrightarrow \: f = \dfrac{1}{0.25}$

$\qquad \sf \dashrightarrow \: f = 4 \: hertz$