What does pen stand for? PEN originally stood for “Poets, Essayists, Novelists”, but now stands for “Poets, Playwrights, Editors, Essayists, Novelists”, and includes writers of any form of literature, such as journalists and historians. Why pencils are not used in space? To understand why NASA was so keen on a workable space pen, you have […]
What is the symbol of cobalt?
What is the symbol of cobalt? Co What are the effects of cobalt on humans? Cobalt dust may cause an asthma-like disease with symptoms ranging from cough, shortness of breath and dyspnea to decreased pulmonary function, nodular fibrosis, permanent disability, and death. Exposure to cobalt may cause weight loss, dermatitis, and respiratory hypersensitivity. What is […]
Did Newton agree with Galileo?
Did Newton agree with Galileo? Galileo determined the laws of gravity and explored the laws of motion on earth. Newton first conclusively affirmed the laws of motion and linked them with Kepler’s laws of planetary motion. Galileo had suggested this, but was censored by the Church before he was able to do further work to […]
What three conclusions came from the gold foil experiment?
What three conclusions came from the gold foil experiment? most of the alpha particles did pass straight through the foil. a small number of alpha particles were deflected by large angles (> 4°) as they passed through the foil….Rutherford and the nucleus. What happened Rutherford’s conclusions Most of the alpha particles did pass straight through […]
Why do the two slits need to be small in order for an interference pattern to occur?
Why do the two slits need to be small in order for an interference pattern to occur? The very short wavelengths of visible light explain why interference effects are observed only in special circumstances—the spacing between the sources of the interfering light waves must be very small to separate regions of constructive and destructive interference. […]
How does electrostatic occur?
How does electrostatic occur? Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. The rubbing of certain materials against one another can transfer negative charges, or electrons. […]
Can Methanol hydrogen bond with itself?
Can Methanol hydrogen bond with itself? Methanol is certainly similar to formaldehyde in some ways. It is these strong hydrogen bonds that are responsible for the relatively high boiling point of methanol; there is so much positive charge on the hydrogen of the OH group that it can essentially form a real bond with the […]
What are natural resources quizlet?
What are natural resources quizlet? A natural resource is anything that people can use which comes from nature. Examples of natural resources are air, water, wood, oil, wind energy, hydro-electric energy, iron, and coal. What is an example of a renewable natural resource? Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind […]
Why does rain make me feel safe?
Why does rain make me feel safe? Studies have found that when rain sounds enters people’s brain, brain unconsciously relaxes and produces alpha waves, which are very close to the state of brain when human sleeps. Rain sound is generally between 0 and 20 kHz. It is not upsetting. On the contrary, this sound makes […]
Does helium go bad?
Does helium go bad? No, helium does not expire. You must close the valve tightly or helium will leak over time. Are Balloon Time tanks recyclable? What weight can helium lift? Helium atoms weigh less than the oxygen and nitrogen atoms in the air. Helium has a lifting force of about one gram per litre. […]