Year: 2021

Why does rubbing two balloons repel? Rubbing the balloon onto your hair or onto the wool fabric adds electrons to the balloon and causes the balloon to become negatively charged. Like charges repel (the two balloons, once charged, will move away from each other) and opposite charges attract (the paper will be attracted to the […]

What are the three main rock types? There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. How do I identify rocks and minerals? To […]

How far is Mt Baker from Vancouver? 69.5 miles Is Mt Baker visible from Vancouver? Located in the Mount Baker Wilderness, it is visible from much of Greater Victoria, Nanaimo, and Greater Vancouver in British Columbia, and to the south, from Seattle (and on clear days Tacoma) in Washington. Is Mt Baker dangerous? The next […]

Can a matrix have nullity 0? As to why a matrix is invertible if is has zero nullity, this comes back to what it means for a matrix (or more specifically a linear map) to be invertible. It means that you can reverse its effects. If a matrix has nullity above 0, that means there […]

What does the 2 mean in acceleration? It is the change of velocity over time, so for example how much change in velocity (m/s) you have per second. So the unit of acceleration is meters per second per second, or just per square second. What do you mean by an acceleration of 5 m s2? […]

What happens if you add too much solvent during recrystallization? If you add too much solvent, the solution may be too dilute for crystals to form. It is important to slowly cool the flask first to room temperature and then in ice-water. A rushed crystal formation will trap impurities within the crystal lattice. Furthermore, the […]

Is it hard to memorize the periodic table? The only way anyone can memorize the periodic table quickly is to already be good with memory techniques, ideally the Memory Palace technique. In fact, you’ll probably want several Memory Palaces in the manner I’ll show you in this guide. But don’t put the cart ahead of […]

How does coarse hair look like? It doesn’t mean that your hair is rough textured or hard to manage. When you take a strand of coarse hair and roll it between your fingers, you can feel its thickness. It typically feels and looks wider than a piece of sewing thread. With fine hair, the strand […]

Do lone pairs affect bond length? Re: Lone Pairs Affect on Bond Strength Lone Pairs of electrons on neighboring atoms weaken the bond because of electron repulsion. Neighboring atoms in a molecule that have lone pair electrons will not be held together in their bond as tightly because the lone pair electrons of both atoms […]

What does condemns mean? transitive verb. 1 : to declare to be reprehensible, wrong, or evil usually after weighing evidence and without reservation a policy widely condemned as racist. 2a : to pronounce guilty : convict. b : sentence, doom condemn a prisoner to die. Is Condensely a word? verb (used with object), con·densed, con·dens·ing. […]