Question

An oscillator makes 720 vibrations in 3 minutes.

A: How many vibrations does it make in one minute?

B: How many vibrations does it make in one second?

C: What is its period in seconds?

D: What is its frequency in hertz?

Answer 1

Below :)

Step-by-step 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 = (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 = (1)/(4) \: sec`

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

#4. what is it's frequency in hert •

`\qquad \sf  \dashrightarrow \: f = (1)/(t)`

`\qquad \sf  \dashrightarrow \: f = (1)/(0.25)`

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