Which statement is the best example of pseudoscience?
2 answers:
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Answer:
B. A rolling ball moves uphill.
Explanation:
A rolling ball moving uphill is a typical example of how kinetic energy is changing in to potential energy
Kinetic energy is the energy due to a body in motion.
Potential energy is the energy at rest in a stationary body.
Potential energy is dependent on the mass, height and acceleration due to gravity on a body;
P. E = mgh
A ball moving uphill will have its height increasing and this will cause surge in potential energy.
Kinetic energy on the other hand depends on the mass and velocity of a body;
K.E = m v²
A ball moving up slope will have the velocity reducing and the kinetic energy reducing.
Therefore, ball rolling uphill will be decreasing in kinetic energy but increasing in potential energy.
Answer:
Explanation:
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In this case, since the reaction between nitrogen and hydrogen produces ammonia:
We can compute the volume of the container by using the ideal gas law at STP (1 atm and 273.15 K):
Next, since nitrogen and hydrogen are in a 1:3 mole ratio, we understand all the nitrogen and hydrogen are consumed and only ammonia remains at the end of the reaction in the following amount:
Thus, the final pressure turns out:
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