Answer: velocity
Explanation: it's the rate of change of the objects position/ consistent change
Answer: When you touch wet canvas, surface tension will draw water to your finger. However, the drop left behind where you touched, like any irregular point on an overhead surface, will draw condensation from inside the tent if it is humid.
Adding thermal energy
Performing work on the system
Trial and error
scientific laws and theories are proven by experimental data and large bodies of evidence.