Cai is a married woman in her late 20s who had her first child two years ago. she worked for several years at a financial firm before having her child and is now planning to rejoin the workforce. research suggests that she will likely face a reduction in salary once she begins working again. the earnings reduction cai will likely experience is referred to by researchers as

the motherhood penalty.

Explanation:

The motherhood penalty refers to the disadvantages a mother faces at her workplace in comparison to the childless women. The disadvantages include the pay gap, reduction in wages, completion at the workplace, etc. The sociologist produced various theories to showcase the ill effects faced by working mothers. And this discrimination increases with the consecutive birth. Motherhood is excepted with a low level of concentration at the workplace, lower productivity and grater competences at task ability.

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals