What is the power of an appliance? The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where: 1 W = 1 J/s (joule/second). Appliances used for heating have a much higher rating than those used to produce light or sound. […]
Why does a straw look bigger in water?
What are the features of a sedimentary rock?
What are the features of a sedimentary rock? Sedimentary rocks contain rounded grains in layers. The oldest layers are at the bottom and the youngest layers are at the top. Sedimentary rocks may contain fossils of animals and plants trapped in the sediments as the rock was formed. What type of minerals are found in […]
What do prokaryotes and eukaryotes have in common?
What do prokaryotes and eukaryotes have in common? Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Ribosomes are the non-membrane bound organelles where proteins are made, a process called protein synthesis. Do prokaryotic and eukaryotic cells have Golgi bodies? Eukaryotic cells contain a membrane-bound […]
Are darkroom chemicals dangerous?
Are darkroom chemicals dangerous? The majority of chemicals used in the black and white darkroom are classified in the range of non-toxic to slightly toxic. However, black and white developers can be toxic, especially if when ingested or inhaled or when in contact with bare skin. Are the chemicals used to develop film Toxic? Most […]
How much horsepower does a barge have?
How much horsepower does a barge have? Power from their diesel engines ranges from 600 to over 10,000 horsepower. River barges also have flat bottoms and are usually 200′ long and 35′ wide. What is the most powerful tugboat in the world? FUN FACT: While the 309.6t bollard pull of the ALP Striker is surely […]
Are we due for another Ice Age?
Are we due for another Ice Age? Researchers used data on Earth’s orbit to find the historical warm interglacial period that looks most like the current one and from this have predicted that the next ice age would usually begin within 1,500 years. What is the biggest problem with climate change? Climate change is already […]
Which two conditions can limit the usefulness of the kinetic?
Which two conditions can limit the usefulness of the kinetic? The two conditions that can limit the usefulness of the kinetic-molecular theory in describing gas behavior are “high pressure” and “low temperatures”. Does kinetic energy give off heat? Heat is simply a form of kinetic energy, the total kinetic energy of random motion of all […]
What happens when entropy decreases?
What happens when entropy decreases? The total entropy of a system either increases or remains constant in any process; it never decreases. For example, heat transfer cannot occur spontaneously from cold to hot, because entropy would decrease. Entropy is very different from energy. Entropy is not conserved but increases in all real processes. What causes […]
Is the relationship between frequency and wavelength direct?
Is the relationship between frequency and wavelength direct? Wavelength (typically measured in nanometers) is the distance between two points in a wave. Frequency and wavelength have both direct and inverse relationships. The wave with shorter wavelength will have a higher frequency while a longer wavelength will have a lower frequency. Is frequency and energy directly […]