What can you use instead of a battery? Hydrogen fuel cells. Toyota is still plugging away with hydrogen fuel cell cars and it isn’t the only one working to find a solution. Lithium-sulfur. Graphene supercapacitors. Redox flow batteries. Aluminum-graphite batteries. Bioelectrochemical batteries. Solar panels. Powered roads. What should I do with dead batteries? Ordinary Batteries: […]
Why is potential energy negative in an atom?
Why is potential energy negative in an atom? When a stable atom is formed, the electron is attracted to the nucleus, r is less than infinity, and the energy will be negative. A negative value for the energy implies that energy must be supplied to the system if the electron is to overcome the attractive […]
What is normal oxygen level at high altitude?
What is normal oxygen level at high altitude? Up in Summit, oxygen saturation is around 92%. Visitors coming to Summit from sea level might see their oxygen saturation drop to around 88% or lower before reaching levels typical at this elevation. At what height is it hard to breathe? An elevation of about 20,000 feet […]
What are the 3 ways machines make work easier?
What are the 3 ways machines make work easier? Background Information. There are three ways simple machines make work easier: by increasing the distance through which force is applied, by changing the direction of applied force, or by multiplying force of speed of the energy applied. Why is no machine 100 efficient? A machine cannot […]
Which ocean zone is the coldest?
Which ocean zone is the coldest? thermocline What are the five zones? The earth is divided into five distinct zones based on their climatic conditions, known as geographical zones. These zones are the North Frigid Zone, the North Temperate Zone, the Tropics, the South Frigid Zone, and the South Temperate Zone. What are the 5 […]
Why does my foot hurt when I kick a soccer ball?
Why does my foot hurt when I kick a soccer ball? There are a number of reasons which have been mentioned (e.g. air temperature affecting ball stiffness, kicking technique, possible injury). Another reason may be that your anatomy hasn’t developed to sustain kicking a ball. Think about how kickboxers can block with their shins. How […]
What is it called when glaciers move?
What is it called when glaciers move? A glacier might look like a solid block of ice, but it is actually moving very slowly. The glacier moves because pressure from the weight of the overlying ice causes it to deform and flow. Occasionally a glacier speeds up. This is called surging. What is the longest […]
What is the volume of oxygen occupied by 2 moles?
How will the player stop sliding?
How will the player stop sliding? Friction opposes the motion of two objects when they come in contact with each other. In this case friction between the players’ shoes and the basketball court keep the players from sliding. What material causes the most friction? Rougher surfaces have more friction between them than smoother surfaces. That’s […]
Did Elizabeth 1 go to war?
Did Elizabeth 1 go to war? Queen Elizabeth I reigned for 44 years and 127 days. In her reign she faced three main wars. They were: The Desmond Rebellion, the English War against Spain and the Tyrone Rebellion. The English war against Spain lasted from 1585 – 1603 (18 years). What does Elizabeth mean when […]