One partner selling goods to the partnership at a profit

Q: One of my friends wants to open a store with me in a partnership. We will share the profits equally by each of us receiving 50%. However, my main store will supply stock for this store at a small profit to me only (to cover transport costs, wages for my workers who will be loading, offloading, marking, etc.). What is the Shar’ee perspective regarding this arrangement?

Using binaural beats for health issues

Q: My question is, can binaural beats be used by a Muslim if he/she just wants to do self help for getting rid of any kind of disease, skin problems, hair issues, obesity, depression, anxiety etc. Though he/she got exhausted by visiting so many doctors again and again and also used home remedies for getting rid of their health issues but nothing positively happend... If he/she just only considers that all the benefits will come from Almighty Allah if I use binaural beats to make my health and appearance better... Nothing and no one has power to grant the benefits and goodness but only Allah Almighty...

Solipsism

Q: Can you prove solipsism wrong? Solipsism is the view or theory that the self is all that can be known to exist. I mean, you don't know whether others have feelings just like you or not, but you will just see that they are crying but can never be sure of the fact they actually have feelings.

Verification of a Hadith

Q: May I know if the following hadith is authentic?

Salman Al-Farsi quoted the Nabi (sallallahu alaihi wasallam) as saying: “Observe the night prayer; it was the practice of the righteous before you and it brings you closer to your Rabb and it is penance for evil deeds and erases the sins and repels disease from the body.” [At-Tabarani]

Doubting the help of Allah Ta'ala

Q: Sometimes we are told to have patience and expect the help of Allah Ta'ala in times of difficulty. Examples are given of Ebrahim (alaihis salaam) as he was flung over the fire, or the help of Allah Ta'ala to Nuh (alaihis salaam) through the ark, etc. But there are also many cases where prophets themselves were killed, or good believers were killed, and so they were not saved by Allah Ta'ala.

How should we reconcile this, that we may sometimes encourage a person that Allah Ta'ala's help will come as long as you have yaqeen, yet there are many cases where prophets or believers with perfect yaqeen still were made shaheed.