Why is concave mirror used in Searchlight & head lights? When the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity (longer distances) and at infinity they are approximately parallel. Hence, concave mirrors are used in the headlights of vehicles. What is the role of […]
What is the main advantages of using a fuse?
What is the main advantages of using a fuse? 1) It is the cheapest form of protection. 2) It doesn’t need any maintenance . 3) Its operation is completely automatic and requires less time as compared to circuit breakers. 4) The smaller sizes of fuse element impose a current limiting effect under short-circuit conditions. What […]
What are some long term consequences of desertification?
What are some long term consequences of desertification? Desertification reduces the ability of land to support life, affecting wild species, domestic animals, agricultural crops and people. The reduction in plant cover that accompanies desertification leads to accelerated soil erosion by wind and water. How can we reduce land degradation? 5 possible solutions to soil degradation […]
Why are fair weather predictions sometimes incorrect?
Why are fair weather predictions sometimes incorrect? Answer Expert Verified 2) The atmosphere always changes with natural disasters occurring such as pollutants in the air that make forecasting difficult. 3) Most of the times meteorologists base their forecasts on probability. Because of differences in the climate, those temperatures are not the same, so errors occur. […]
Which mode transistor is used as amplifier?
Which mode transistor is used as amplifier? common-emitter configuration Which is the largest of the three transistor current? The common emitter amplifier configuration produces the highest current and power gain of all the three bipolar transistor configurations. What is the highest current in any bipolar transistor? The rating for maximum collector-emitter voltage VCE can be […]
What is a lowest energy?
What is a lowest energy? These zones are known as energy levels (or sometimes called electron shells). At the lowest energy level, the one closest to the atomic center, there is a single 1s orbital that can hold 2 electrons. At the next energy level, there are four orbitals; a 2s, 2p1, 2p2, and a […]
How do I calculate simple interest?
What are the 4 stages of drug development?
What are the 4 stages of drug development? Drug Development Phases Phase 1: Discovery and Development. Phase 2: Preclinical Research. Phase 3: Clinical Research. Phase 4: FDA Review. Phase 5: FDA Post-Market Safety Monitoring. What percentage of drugs get FDA approval? 9% Which drugs do not need an FDA approval? A few current (and some […]
How is oxygen maintained in the atmosphere?
How is oxygen maintained in the atmosphere? The balance of oxygen and carbondioxide is maintained in the atmosphere by the oxygen released by plants during photosynthesis and carbondioxide released by human,animals etc. in the atmosphere. The balance of oxygen and carbondioxide is made due to respreration and photosinthesis. How did we get oxygen in our […]
What simple machine is dominoes?
What simple machine is dominoes? lever Did Rube Goldberg build his machines? A prolific cartoonist and visionary, Rube Goldberg has become more famous for the inventions bearing his name than for his cartoons and political illustrations. Within his comic strips Goldberg created extremely complex machines that were built to perform a simple task. What is […]