What is 450g of flour a measure of? a weight b inertia c gravity d mass

The correct answer is option D.

Explanation:

450 grams of flour is a measure of mass.

Mass is defined as amount of matter present in a object.

Weight is defined as the force exerted by the center of the earth on the object to attract it towards its center.

Inertia is defined as property of the body due to which continues its existing state of rest or motion in straight line , unless that state cahnged by any other external force.

Gravity is defined as a force which attracts the body to the center of the earth.

So, from the given options the correct answer is option D.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)