Siobhan wants to measure the mass of a bag of flour. what should she do? use a balance and record the data in kilograms use a beaker with water and record the data in newtons use a balance and record the data in newtons use a beaker with water and record the data in kilograms

Use a balance and record the data in kilograms.

Explanation:

To answer this question, we need to know the difference between a balance and a scale.

A balance measures mass. In other words, a balance measures the amount of matter of an object. This measure is made by comparison with an object which mass is already known.

On the other hand, a scale measure weight, which is Netwons. Because a scale doesn't compare the unknown mass with another known mass. A scale measure the force due gravity exerted on an object.

Therefore, the right answer here is the first choice: Use a balance and record the data in kilograms.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.