What are the disadvantages of cross sectional studies? As cross-sectional studies measure prevalent rather than incident cases, the data will always reflect determinants of survival as well as aetiology1. Unable to measure incidence. Associations identified may be difficult to interpret. Susceptible to bias due to low response and misclassification due to recall bias. What are […]
How many solar and lunar eclipses are there in 2020?
How did Bernard Palissy discover the water cycle?
How did Bernard Palissy discover the water cycle? Palissy was the first person to consider the water cycle. When he observed some coastal areas, he found out it had salt water and fresh water. He presumed the fresh water was coming from the rainfall. How did we discover the water cycle? The Earth’s water cycle […]
What is the function of ribcage?
What is the function of ribcage? The ribs are the bony framework of the thoracic cavity. The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration. There are twelve pairs of ribs. Each rib articulates posteriorly with two thoracic vertebrae by the costovertebral […]
What happens when light touches a mirror?
What are 5 disadvantages of geothermal energy?
What are 5 disadvantages of geothermal energy? What are the Disadvantages of Geothermal Energy? Environmental Concerns about Greenhouse Emissions. Possibility of Depletion of Geothermal Sources. High Investment Costs for Geothermal System. Land Requirements for Geothermal System to Be Installed. Is geothermal energy hard to get? Even compared to combined-cycle gas plants, geothermal energy is four […]
What is polyatomic ion give example?
What is polyatomic ion give example? Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit. What is the […]
What other quantity is your slope equal to?
What other quantity is your slope equal to? The slope is representing the change in v over the change in time. By definition, this is the acceleration. Also more than just a gimmick, it’s geometry’s way of showing us how variables not only relate to one another, but how they can represent the rate of […]
What is the importance of being precise and accurate?
What is the importance of being precise and accurate? When taking scientific measurements, it is important to be both accurate and precise. Accuracy represents how close a measurement comes to its true value. This is important because bad equipment, poor data processing or human error can lead to inaccurate results that are not very close […]
Why do we use thin gold foil?
Why do we use thin gold foil? For the scattering experiment, Rutherford wanted a metal sheet which could be as thin as possible. Gold is the most malleable of all known metals. It can easily be converted into very thin sheets. Hence, Rutherford selected a gold foil for his alpha-ray scattering experiment. What was most […]