If your Amazon order comes on Shabbos can you use the package on Shabbos?

The halachic questions in buying from supermarkets after pesach. Is a mechira valid if the owner contines to do business with the chametz?

Can you own stock in a company that has chametz? Do you have to sell your shares with the rest of your chametz? What is the halachic status of a corporation?

Is quinoa considered to be kitniyos?

Can you listen to megillah or havdalah on a microphone? Should you answer amen to a bracha heard on zoom?

Does tuna need a mashgiach temidi and bishul yisroel? 

 Is it fleishig or parve? Does it need to come from a kosher animal?

Can you fix a stuffed toilet on Shabbos? 

Can you adjust a Shabbos clock to make it go on or off earlier or later than it was set for?

Shaving with an electric shaver, foil screens, lift and cut and creams.