Why do electrons do not fall in nucleus?

Why do electrons do not fall in nucleus? Quantum mechanics states that among all the possible energy levels an electron can sit in the presence of a nucleus, there is one, which has THE MINIMAL energy. This energy level is called the ground state. So, even if atoms are in a very very called environment, […]

What are the negative effects of infrared?

What are the negative effects of infrared? IR, particularly IR-A or near IR [700nm-1400nm], raises the internal temperature of the eye, essentially “baking” it. Medical studies indicate that prolonged IR exposure can lead to lens, cornea and retina damage, including cataracts, corneal ulcers and retinal burns, respectively. Can infrared radiation kill you? Infra-red light affects […]

How do you fight a polar bear?

How do you fight a polar bear? If you encounter a polar bear, keep these tips in mind: Good luck. Polar bears are the biggest bears on Earth, and they’re much harder to scare than brown or black bears. Don’t act like prey. Do act like a threat. Use bear spray. Don’t give up. How […]

What are the rules for a series circuit?

What are the rules for a series circuit? In summary, a series circuit is defined as having only one path through which current can flow. From this definition, three rules of series circuits follow: all components share the same current; resistances add to equal a larger, total resistance; and voltage drops add to equal a […]

What are the three types of pain receptors?

What are the three types of pain receptors? Within the central nervous system, there are three types of opioid receptors which regulate the neurotransmission of pain signals. These receptors are called mu, delta, and kappa opioid receptors. What are the two types of pain fibers? Each of the spinal nerves emerging from the spinal cord […]

Is buoyant force constant?

Is buoyant force constant? Because the volume is the same at any depth, and the density of water is the same at any depth, the total mass of displaced water (mass = volume x density) is the same at any depth—making the buoyant force constant. Why is a heavier object more likely than a lighter […]

Why do black things absorb light?

Why do black things absorb light? Light energy can be converted into heat energy. A black object absorbs all wavelengths of light and converts them into heat, so the object gets warm. A white object reflects all wavelengths of light, so the light is not converted into heat and the temperature of the object does […]

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