Which of the following is an example of how a scientist might use a model? question 2 options: stopwatches measure the amount of time it takes for a swimmer to go one lap in the pool. marbles placed inside a hollow sphere are used to describe protons in a nucleus. a telescope is used to see the moons orbiting jupiter. a saw is used to cut a board in half.

Three of the options have something in common: the scientists are using an instrument to measure or manipulate something:

Stopwatches measure the amount of time it takes for a swimmer to go one lap in the pool.

 A telescope is used to see the moons orbiting Jupiter.

 A saw is used to cut a board in half.

here the stopwatch, telescope and a saw are uses as instruments.

in the remaining options, the marbles represent something, and a model is exactly that: a representation of an idea, so the correct answer is Marbles inside a hollow sphere - they are a model of a nucleus.

A)virusb)virus hope it's true..

Bis the correct answer.