an oscillator makes 1800 vibrations in 3 minutes.

how many vibrations does it make in one minutes?
how many vibrations does it make in one second?

To find out how many vibrations the oscillator makes in one minute, you can use the concept of proportionality. Since the problem tells you that the oscillator makes 1800 vibrations in 3 minutes, you can set up the following proportion:

1800 vibrations / 3 minutes = x vibrations / 1 minute

To solve for x (the unknown number of vibrations in one minute), you need to do cross multiplication. Multiply the number of vibrations (1800) by 1 minute and divide the result by 3 minutes:

x = (1800 vibrations * 1 minute) / 3 minutes
x = 600 vibrations per minute

So, the oscillator makes 600 vibrations in one minute.

To find out how many vibrations the oscillator makes in one second, you can again use the concept of proportionality. Since there are 60 seconds in one minute, you can set up the following proportion:

600 vibrations / 1 minute = x vibrations / 1 second

Again, do cross multiplication to solve for x:

x = (600 vibrations * 1 second) / 1 minute
x = 10 vibrations per second

So, the oscillator makes 10 vibrations in one second.