How much heat is released by a 15-gram sample of water when it is cooled from 40.oC to 30.oC?

Q = -627.6 J

Explanation:

Mass, m = 15 grams

Initial temperature,

Final temperature,

We need to find the amount of heat released by this much of sample of water. We know that heat released is given by the below formula :

c is specific heat of water,

So,

Hence, 627.6 J of heat is released and negative sign shows that energy is being given off.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter