Is metallic physical or chemical property? Physical Properties of Metals State: Metals are solids at room temperature with the exception of mercury, which is liquid at room temperature (Gallium is liquid on hot days). Luster: Metals have the quality of reflecting light from their surface and can be polished e.g., gold, silver and copper. Is […]
What stage of mitosis takes the shortest?
What stage of mitosis takes the shortest? anaphase What stage is observed most frequently in mitosis? metaphase What is the relationship between DNA Chromatin and Chromosomes? ​Chromatin Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell’s genetic instructions. The major proteins in chromatin are histones, which help […]
What can a shadow tell you about the size of the source of light?
What can a shadow tell you about the size of the source of light? The location of a light source relative to the object casting shadows determines the size of the shadows. Alternatively, moving the light closer to the subject will enlarge the shadow, making the shadow much bigger than the subject itself, as shown […]
Which experiment is known as the most beautiful experiment?
Which experiment is known as the most beautiful experiment? The Meselson-Stahl experiment Which model of DNA replication is correct? The semi-conservative model is the intuitively appealing model, because separation of the two strands provides two templates, each of which carries all the information of the original molecule. It also turns out to be the correct […]
When you ride a bicycle at full speed which has the greater momentum you or the bike?
Can Bose-Einstein condensate flow?
Can Bose-Einstein condensate flow? Bill Phillips, Kris Helmerson and colleagues at the National Institute of Standards and Technology (NIST) in Maryland can instigate persistent flow in a BEC consisting of a gas of sodium atoms cooled to just above absolute zero. Is Bose-Einstein condensate naturally occurring? Bose-Einstein condensates can be created here on Earth, using […]
When would the center of mass change?
When would the center of mass change? If a system experiences no external force, the center-of-mass of the system will remain at rest, or will move at constant velocity if it is already moving. If there is an external force, the center of mass accelerates according to F = ma. How does the Centre of […]
What is the biggest sunken treasure ever found?
What is the biggest sunken treasure ever found? Nuestra Senora de Atocha Can you claim sunken treasure? A country may claim ownership of a wreck if it owned the ship in the first place. Even if a vessel was sunk and abandoned for hundreds of years the original owner can still claim ownership rights. However, […]
What is the role of science and technology in the society?
What is the role of science and technology in the society? The essence of how science and technology contributes to society is the creation of new knowledge, and then utilization of that knowledge to boost the prosperity of human lives, and to solve the various issues facing society. How does science and technology help society? […]
Where does the energy of redshifted photons go?
Where does the energy of redshifted photons go? Where does the energy go when light is redshifted? It doesn’t go anywhere. Let’s say we’re motionless with respect to some source which is emitting a stream of photons. We agree that the photons have some energy E=hf. How much energy is lost when light hits a […]