Out of the five major mass extinction, one is Cretaceous-Tertiary extinction (K-T extinction). It happened 66 million years ago marked by the end of the Cretinous period.
Answer:
Logs in a fire is an example of something burning, also changing its state of form. I think thats chemical change; going from wood to ashes. And charged batteries means they haven't been used yet or they were just charged, resulting in physical change.
Explanation:
I just learned this in science.
I hope this helps!
Answer:
c. 157 KJ
Explanation:
Q= mC dT dT= 100°C(boiling point) - 25°C=75°C
Q= (500 g * 4.184 J/g °C * 75 °C)
Q= 156900 J= 157 KJ
They are not always identical because they have different isotope numbers which develops different neutrons numbers
