Inside a calorimeter is 100 g of water at 39.8 C. A 10-g object at 50 C is placed inside the calorimeter. When equilibrium has been reached, the new temperature of the water and metal object is 40 C. What type of metal is the object made from?

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

It is 4.92 e-4 sorry if i am wrong

The answer is c) pyrite