What is the closed physical system? A. Non of the answers are true

B. A system where matter and energy can leave but not enter the system

C. a system where matter and energy can leave but not enter the system

D. A system where matter and energy can not enter or leave the system

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

What are the necessary conditions for fusion?

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction