Is water actually tasteless? Our perception of flavor is based on aroma, and the five basic tastes: sweet, salty, bitter, sour and savory. Pure water does not contain compounds that elicit any of these tastes, and has a neutral scent, so we deem it “tasteless.” Why the water has no Colour? Water has no color […]
What is called metal and nonmetal?
What is called metal and nonmetal? Elements can be divided into metals and nonmetals and it is important to know whether a particular element is a metal or nonmetal. Metals (like copper and aluminium) are good conductors of heat and electricity, while nonmetals (such as phosphorus and sulfur) are insulators. What is difference between metal […]
Which statement best describes the difference between a physical change and a chemical change?
Which statement best describes the difference between a physical change and a chemical change? Thus, we can conclude that the statement a physical change is a change from one state of matter to another; a chemical change results in a new substance formed, is correct. What are the 5 chemical changes? The five conditions of […]
What two factors determine wave speed?
What two factors determine wave speed? Waves travel through a medium: A medium is any substance or region through which a wave is transmitted. The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f). […]
What is the difference between the natural and forced convection?
What is the difference between the natural and forced convection? The key difference between natural and forced convection is that in natural convection, the motion of the fluid is influenced by natural means whereas, in forced convection, the motion of fluids is influenced by external means. What are the two differences between free and forced […]
Do plants grow better at higher altitudes?
Do plants grow better at higher altitudes? At such times of the day, plants growing at high elevations have a relative advantage, as incident sunlight increases with altitude. Under such conditions and where water is available and stomata remain open, a 1000 m elevation above sea level may bring about a doubling of transpiration rates. […]
What are the 12 steps of the scientific method?
What are the 12 steps of the scientific method? Let’s build some intuition for the scientific method by applying its steps to a practical problem from everyday life. Make an observation. Ask a question. Propose a hypothesis. Make predictions. Test the predictions. Iterate. What type of question can the scientific method attempt to answer? Hypothesis […]
Is bullet proof glass expensive?
Is bullet proof glass expensive? Depending on the size and type of bullet-resistant glass, it can cost between $25 and $100 per square foot. Although polycarbonate plastic can bond with glass to resist bullets, paper towels can scratch its surface and ammonia-based window cleaning liquids will damage the material. Do ex presidents have Secret Service […]
What determines the color of a main sequence star?
What determines the color of a main sequence star? Temperature translates to color, and this relationship between color and brightness (luminosity) for hydrogen-burning stars is called the main sequence. Massive hydrogen-burning stars are blue-white, the Sun is yellow, and low-mass stars are orange and red. What is the primary reason for the star evolution? The […]