<span>This rate tends to be faster than in most other periods. The rates in previous eras was very gradual and did not have as much of a deleterious effect on the life that was present: today's rate is much more rapid and has the potential to do much more damage to the life on the planet.</span>
When the spring is compressed its potential energy will increase.
<u>Explanation:
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- When you a compress or stretch a spring that you work against the restoring work of the spring the potential energy of the spring increases.
- This work is stored as the elastic potential energy of the spring. The potential energy increases with displacement from the equilibrium position of the spring
- So, when the compression is doubled its potential energy increases double the time along with displacement.
I believe your answer is B. Technology we have today wasn't available 100 years ago, and therefore studies and theories would also be different back then compared to the studies and theories we have today.
An reaction that releases energy into the environment.
The enthalpy change (energy taken in for bond breaking of reactants - energy released for bond forming of products) can be used to determine whether a reaction is exothermic or endothermic. Since an exothermic reaction has a negative enthalpy change, it means it releases more energy than what it takes in. Hence the third statement is correct.
