Category: Physics

Do electrons flow from positive to negative in a battery? Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets the electrons flow through it, they flow from negative to positive. What are […]

How do you know if a reaction is exothermic? In the case of an exothermic reaction, the reactants are at a higher energy level as compared to the products, as shown below in the energy diagram. In other words, the products are more stable than the reactants. Overall Δ H ΔH ΔH for the reaction […]

How hard is it to push a bullet through a barrel? A bullet will NOT drop through the barrel like a marble down a drain pipe, in a modern firearm. In a modern firearm with rifling, the bullet is a little larger than the barrel diameter from land to land, so it won’t simply fall […]

What amount of heat is required to raise the temperature? The heat capacity of a substance is the amount of heat required to raise the temperature of a defined amount of pure substances by one degree (Celsius or Kelvin). The calorie was defined so that the heat capacity of water was equal to one. Which […]

How many DC forces are there? seven different forces Who is faster Flash or Kid Flash? Barry is faster and it has been said in the beginning of season 4 and there is no evidence to suggest that Wally has gotten faster. Wally may have a different connection to the speed force than Barry with […]

Why are some rock layers missing? Something else that fits into Geologic Principles and basic stratigraphy (study of rock layers) are unconformities. Unconformities are simply gaps (missing data) in the rock record, these gaps could indicate a variety of processes. Such as: erosion, deformation, or changes in sea-level. What type of rock is extrusive? Extrusive, […]

What are the standards of measurement? In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures, against which all other measuring devices are […]

Is white light colorless? White light is a mixture of colors. When you look at the sun’s visible light, it appears to be colorless, which we call white. Although we can see this light, white isn’t considered part of the visible spectrum. That’s because white light isn’t the light of a single color but instead […]

What is the lifespan of a seahorse? one to four years What animals die after giving birth? Octopuses are semelparous animals, which means they reproduce once and then they die. After a female octopus lays a clutch of eggs, she quits eating and wastes away; by the time the eggs hatch, she dies. What is […]

What do you do when your heat pump blows cold air? What to do if your heat pump is blowing cold air Turn off the heat at the thermostat and check your air filter. If it’s dirty, change it! Make sure the thermostat is set to “AUTO”, not “ON”. When set to “ON” the fan […]