The north vectors add up as so the south vectors. Then subtract the two. For north its 4 + 5 = 9. South is 2 + 5 = 7. Then 9-7 = 2km North (D)
Explanation:
A chemical reaction in which heat or energy is released is known as an exothermic reaction.
On the other hand, when two objects are placed together and heat flows from hotter object to colder object then this process is known as conduction. Therefore, energy is dissipated in conduction process.
Since energy released released goes into the atmosphere and is not used anywhere.
Thus, we can conclude that when an exothermic reaction releases thermal energy, this energy is usually not useable to do work and it is dissipated by conduction.
Model I'm guessing. Coz that's using an object to explain
I think answer is A. The Brightness of a Star
Answer:
The object's maximum speed remains unchanged.
Explanation:
The speed of a particle in SHM is given by :
Maximum speed is, 
If A' = 2A and T' = 2T
So, the maximum speed of the object remains the same i.e. it remains unchanged. Hence, this is the required solution.
