<span>B, An Arrhenius acid donates H+ ions.</span>
Answer-kinetic energy. The human experience of sound is caused by vibrations. The object creating the sound creates waves of movement through a medium, like air, until it reaches our eardrums, which then vibrate and our brain interprets that as sound. Here are some examples of sound energy:
Answer:
4.88 kg
Explanation:
Amount of energy generated in 1 hour of exercise = 5500 kJ
Thus,
Amount of energy generated in 2 hours of exercise = 5500*2 kJ
So,
Amount of energy generated in 2 hours of exercise = 11000 kJ
Heat of vaporization of water = 40.6 kJ/mol
40.6 kJ of energy is required to vaporize 1 mole of water
Also,
11000 kJ of energy is required to vaporize (1/40.6) * 11000 mole of water
Moles of water = 270.936 moles
Molar mass of water = 18 g/mol
Mass = Moles * Molar mass = 270.936 * 18 g = 4876.8473 g
Also,
1 g = 0.001 kg
So, mass of water = 4.88 kg
The cause of the earths magnetic field is generated from deep down in the core of the earth.
Answer:
Empirical evidence - B - helps scientists understand the natural world.
Explanation:
Definition from the web," Empirical evidence is information acquired by observation or experimentation. Scientists record and analyze this data. The process is a central part of the scientific method. "
<h3>The scientific method-</h3>
The scientific method begins with scientists forming questions, or hypotheses, and then acquiring the knowledge through observations and experiments to either support or disprove a specific theory. "Empirical" means "based on observation or experience," according to the Merriam-Webster Dictionary. Empirical research is the process of finding empirical evidence. Empirical data is the information that comes from the research.
Before any pieces of empirical data are collected, scientists carefully design their research methods to ensure the accuracy, quality and integrity of the data. If there are flaws in the way that empirical data is collected, the research will not be considered valid.
The scientific method often involves lab experiments that are repeated over and over, and these experiments result in quantitative data in the form of numbers and statistics. However, that is not the only process used for gathering information to support or refute a theory.
<h3>This helps scientists by -</h3>
Identifying empirical evidence in another researcher's experiments can sometimes be difficult. According to the Pennsylvania State University Libraries, there are some things one can look for when determining if evidence is empirical:
- Can the experiment be recreated and tested?
- Does the experiment have a statement about the methodology, tools and controls used?
- Is there a definition of the group or phenomena being studied?
