I think they are right! When one of the answers is, all of the above, that is usually the correct answer. pH is important to all living things.
<h2>Hello!</h2>
The answer is: A. 19.3 joules
<h2>
Why?</h2>
Since it's an elastic collision, the kinetic energy after and before the collision will be the same.
Kinetic energy can be calculated using the following equation:
Where:
So,
First object, (going to the right):
Second object:, (going to the left):
Remember,
Hence,
The total kinetic energy after the collision will be:
The total kinetic energy after the collision is 19.3 joules (rounded to the nearest tenth)
Have a nice day!
Answer: They behave the same because, according to the principle of equivalence, the laws of physics work the same in all frames of reference.
Explanation:
According to the equivalence principle postulated by Einstein's Theory of General Relativity, acceleration in space and gravity on Earth have the same effects on objects.
To understand it better, regarding to the equivalence principle, Einstein formulated the following:
A gravitational force and an acceleration in the opposite direction are equivalent, both have indistinguishable effects. Because the laws of physics must be accomplished in all frames of reference.
Hence, according to general relativity, gravitational force and acceleration in the opposite direction (an object in free fall, for example) have the same effect. This makes sense if we deal with gravity not as a mysterious atractive force but as a geometric effect of matter on spacetime that causes its deformation.
Since he wonders, then according to the formal, methodical procedures of scientific inquiry, he should not go running off and trying stuff before he <em>forms a hypothesis that can be tested.</em>
In his mind, at some point, he should say to himself <em>"Self ! It seems to me that if salt is added to water, it makes the water boil at a higher temperature than pure water does."</em>
And only THEN, with this statement in mind, he's ready to design an experiment to test it.
Answer:
= 2.49 × 10³J
Explanation:
Total rotational kinetic energy K = nRT
R = 8.134 J/mol.K
n = 1 mol
T = 300 K
K = 1 × 8.314 × 300
= 2.49 × 10³J
