Category: Physics

What are two examples of the Doppler effect? The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect. Edwin Hubble made the discovery that the universe expands as a consequence of the Doppler Effect. Where is the Doppler effect used? Doppler […]

Is DNA prokaryotic or eukaryotic? Prokaryotic Cells Prokaryotic Cells Eukaryotic Cells Nucleus No Yes DNA Single circular piece of DNA Multiple chromosomes Membrane-Bound Organelles No Yes Examples Bacteria Plants, animals, fungi Are viruses prokaryotes? Prokaryotes and eukaryotes are distinguished on the basis of their cellular characteristics. Viruses are considered neither prokaryotes nor eukaryotes because they […]

What is the full form of laser? Light amplification by stimulated emission of radiation What are the uses of laser technology? Lasers are widely used for laser material processing in manufacturing, e.g. for cutting, drilling, welding, cladding, soldering (brazing), hardening, surface treatment, marking, engraving, micromachining, pulsed laser deposition, lithography, etc. What is Laser What are […]

Is it a look or take Alook? The difference between “have a look” and “take a look” is geographical rather than semantic. The former phrase is usually used in the UK, whereas the latter is usually used in the USA. Is have a look formal? Both of the sentences that you suggested are grammatically correct, […]

How do you know if a sample is representative? A representative sample should be an unbiased reflection of what the population is like. There are many ways to evaluate representativeness—gender, age, socioeconomic status, profession, education, chronic illness, even personality or pet ownership. What percentage of sample is representative? For example, in a population of 1,000 […]

Why do we use 8.314 as the value for R? R = 8.314 is actually the more important value because it is expressed in SI units (note that 1 J = 1 Pa * m^3= 1 N/m^2 * m^3 = 1 N * m). What does R mean in chemistry? R group: An abbreviation for […]

Do neurons allow us to think? In short, our nervous systems detect what is going on around us and inside of us; they decide how we should act, alter the state of internal organs (heart rate changes, for instance), and allows us to think about and remember what is going on. To do this, it […]

Can you run jet fuel in a diesel? Jet fuel (there’s variants, but a very common one is known as Jet A) is really close to regular old diesel fuel. And, for that matter, kerosene. You can even run it straight in your diesel car or truck, though it doesn’t lubricate as well so if […]

How quickly does Peat form? Peat is formed by decomposition and accumulation process of plant materials that grow on the land which is influenced by dry and wet season period. Peat formation occurs in a long period with the formation rate of about 1 mm per year (Charman, 2002), which means 1 m deep peat […]

What type of system is a hydraulic system? A hydraulic system is a drive technology where a fluid is used to move the energy from e.g. an electric motor to an actuator, such as a hydraulic cylinder. The fluid is theoretically uncompressible and the fluid path can be flexible in the same way as an […]