What is a simple definition of thermal energy? The kinetic energy associated with the random motions of the molecules of a material or object; often used interchangeably with the terms heat and heat energy. Measured in joules, calories, or Btu. How do we use thermal energy in our daily lives? Productive uses of thermal energy […]
What are examples of exergonic and endergonic reactions?
What are examples of exergonic and endergonic reactions? Often, one chemical reaction feeds the next and endergonic reactions are coupled to exergonic reactions to give them enough energy to proceed. For example, firefly bioluminescence results from endergonic luminescence by luciferin, coupled with exergonic ATP release. What causes a reaction to be spontaneous? A spontaneous reaction […]
Is hydrogen a new source of energy?
Is hydrogen a new source of energy? Hydrogen is an energy carrier Hydrogen, like electricity, is an energy carrier that must be produced from another substance. Hydrogen can be produced—separated—from a variety of sources including water, fossil fuels, or biomass and used as a source of energy or fuel. Can you make your own hydrogen […]
What is the first step in primary treatment plant?
What is the first step in primary treatment plant? Wastewater Primary Treatment is the first step in the water treatment process meant for removing suspended solids (TSS), oil and grease, colour, and odour. The key components in this step are screens, grit chamber, flow equalization tank, and clarifier. What is primary treatment of water? Primary […]
What race uses condoms the most?
What race uses condoms the most? Use of the male condom was highest among never-married men (60.8%), followed by formerly married men (35.2%) and cohabiting men (23.5%). A higher percentage of non-Hispanic black men used condoms at their last sexual intercourse (54.3%) compared with non-Hispanic white (44.2%) and Hispanic (42.1%) men. Who buys more condoms? […]
How old is a rock that in which 75% of the potassium-40 has turned into argon-40?
How old is a rock that in which 75% of the potassium-40 has turned into argon-40? According to modern scientific dating techniques, approximately how old is the solar system? A rock sample from the moon includes a mineral that contains small amounts of the radioactive isotope Potassium-40 and its daughter element Argon-40 (half-life of 1.3 […]
Why does wind speed increase with altitude?
Why does wind speed increase with altitude? Going up in altitude, the pressure gradient between the warm air and the cold air increases with height. The influence of this friction is less with height above the ground, thus the wind speed increases with height. A third reason is due to air density. Does wind speed […]
How tall is a newborn elephant?
How tall is a newborn elephant? Elephants have a longer pregnancy than any other mammal—almost 22 months. Cows usually give birth to one calf every two to four years. At birth, elephants already weigh some 200 pounds and stand about three feet tall. What is called Elephant Baby? A baby elephant is called a calf. […]
What happens when a photon is absorbed by chlorophyll?
What happens when a photon is absorbed by chlorophyll? What happens when light is absorbed by a molecule such as chlorophyll? The energy from the light excites an electron from its ground energy level to an excited energy level (Figure 19.7). This high-energy electron can have several fates. What happens to chlorophyll after it absorbs […]
What is the dimensional formula of radiation energy?
What is the dimensional formula of radiation energy? Or, E = [M] × [L1 T-1]2 = M1 L2 T-2. Therefore, energy is dimensionally represented as M1 L2 T-2. Does light have a pressure? While most experiments have found that light exerts a pulling pressure, in a new paper physicists have, for the first time, found […]