What animals were alive during the Carboniferous Period? Land animals included primitive amphibians, reptiles (which first appeared in the Upper Carboniferous), spiders, millipedes, land snails, scorpions, enormous dragonflies, and more than 800 kinds of cockroaches. Could humans survive in the Carboniferous period? The earliest period in which humans could live as a land-based rather than […]
How much energy is in the atmosphere?
How much energy is in the atmosphere? On average, 340 watts per square meter of solar energy arrives at the top of the atmosphere. Earth returns an equal amount of energy back to space by reflecting some incoming light and by radiating heat (thermal infrared energy). How does energy transfer in a TV? A television […]
Are tube radios dangerous?
Are tube radios dangerous? AFAIK, these are all voltage regulator tubes and have the standard radiation symbol printed on them (unless it has worn off). 3) CRTs. These are dangerous because of their size and that they contain a vacuum. They can implode (not explode) violently if broken. Are old tube radios safe? An antique […]
Has there ever been a death at Cedar Point?
Has there ever been a death at Cedar Point? On August 13, 2015, a 45-year-old man was killed by the roller coaster after going into the ride’s restricted area to retrieve a dropped cell phone. He was struck in the back of the head by a passing train. Park emergency crews attempted to revive him, […]
Do dense objects sink?
What is the full form of ABC strategy?
What is the full form of ABC strategy? Abstinence, be faithful, use a condom, also known as the ABC strategy or abstinence-plus sex education, also known as abstinence-based sex education, is a sex education policy based on a combination of “risk avoidance” and harm reduction which modifies the approach of abstinence-only sex education by including […]
What is the formula for free fall acceleration?
What is the formula for free fall acceleration? Free fall means that an object is falling freely with no forces acting upon it except gravity, a defined constant, g = -9.8 m/s2. The distance the object falls, or height, h, is 1/2 gravity x the square of the time falling. What is the acceleration of […]
Who created the law of conservation of charge?
Who created the law of conservation of charge? William Watson At what point of a closed circuit conservation of charge is valid? Kirchhoff’s second law, also known as the Kirchhoff’s voltage law (KVL) states that the sum of all voltages around a closed loop in any circuit must be equal to zero. This again is […]
What are 2 types of stressors?
What are 2 types of stressors? There are two broad categories of stressors: Physiological (or physical) stressors and Psychological Stressors. What are positive stressors? Positive stress, otherwise known as good stress or eustress, is the type of stress response that we feel when we get excited. Positive stress can also refer to the times you […]
Is carbon steel a conductor?
Is carbon steel a conductor? Conductivity is a measure of how well a material conducts an electric current. Electric conductivity may be represented by the Greek letter σ (sigma), κ (kappa), or γ (gamma)….Table of Resistivity and Conductivity at 20°C. Material ρ (Ω•m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity Carbon steel […]