Calculate how much heat is released when 500 g of platinum is cooled from 250.0 K to 240.0 K.

What is thought to have caused the mass extinction at the end of the cretaceous period?

What is a group of organisms that are closely related and share similar characteristics

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.