Why is the work output always less than the work input?
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because energy is wasted either in the form of heat energy or something else (like friction)
Does earth's atmospheric pressure cause gravity?
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The Earth's atmosphere is kept close to Earth by gravity. Just as the Earth's gravity keeps you firmly on the ground, it also acts on the gases of the Earth's atmosphere, holding it in place and allowing us to breathe.
An 'atmosphere (from Greek τμός (atmos), meaning "vapour", and σφα ρα (sphaira), meaning "sphere" [1][2] ) is a layer of gases surrounding a planet or other material body of sufficient mass [3] that is held in place by the gravity of the body. An atmosphere is more likely to be retained if the gravity is high and the atmosphere's temperature is low.
The atmosphere of Earth is mostly composed of nitrogen. It also contains oxygen used by most organisms for respiration and carbon dioxide used by plants, algae and cyanobacteria for photosynthesis. It protects living organisms from genetic damage by solar ultraviolet radiation, solar wind and cosmic rays. Its current composition is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
The term stellar atmosphere describes the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Stars with sufficiently low temperatures may form compound molecules in their outer atmosphere.
How far does the car travel from t=2 hrs to t=4 hrs? Here's a pic of Displacement vs. Time for a Car
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The car traveled 5km.
the answer is the car traveled 5km.
I know because i took the test a few weeks ago and got an A on it
sorry im late
oh and just remeber to put the answer i your own words and show show you got it.
hope this helps
List four methods that can be used to separate mixtures and give an example of each method?
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(1) Filtration - example is separating saltwater from sand particles. (2) Distillation - example is apple cider vinegar. Distillation collects the liquid that we want, which is the vinegar and leave out other heavier suspended particles. (3) Centrifuges - example is separating the blood components. They separate the plasma and erythrocytes. (4) Magnetism - example is separating metals from non-metals in electromagnetic cranes, that differentiate between metal and heap of junks.
Cells store energy in the form of what
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Cells store energy either as carbohydrates or lipids (fats and oils).
Carbohydrates provide for fast, short term energy. They are a key part of cellular respiration.
Lipids provide for long term energy storage because storing lipids is much more effective than storing carbs. One gram of lipid can store twice as much as one gram of carbs. So to access this energy storage, cells must conduct hydrolysis (inserting a hydrogen and a hydroxide group to split off the energy).
Hope this helps!
The wavelength of the light is 0.63 micrometers. How much of this length stays in 1 centimeterHELP PLEASE