At the beginning of the 8th paragraph, mrs. mallard senses “something coming to her.” what is it? what effect physically does it have on her?

Explanation:

"The Story of an Hour," is a short story written by Kate Chopin (1894).

This story is about a woman Mrs. Mallard who found out that her husband is dead. She was sad at first, but then she felt happy. She didn't fear the death of her husband, but she was filled with glee and joy. Later, she found out her husband is alive, and she died from heart disease.

As for your questions:

What is it?

At the beginning of the 8th paragraph, Mrs. Mallard senses “something coming to her.” This something was freedom - "She said it over and over under the breath: "free, free, free!"

What effect physically does it have on her?

Mrs. Mallard felt she was free from her husband, she enjoyed the imagining herself in control of her life; it was her reaction after being freed from marriage. But when she found out that her husband is alive, her heart could not stand it. Mrs. Mallard had a sense of freedom for an hour, but that was taken away from her, her heart was unable to lose freedom again, and she died.

I hope it helped you :)