How do solar cells actually was surface else are mainly composed of silicone. Silicon asms have full electrons in their outer shell and are stable but then the silicone is split into 2 layers. Bosphorus is mixed into one like it has 5 electrons in its outer shell one too many which can orbit for. The 2nd layer is mixed with boron which has only 3 out electrons one to feel. That means the layer has gaps which attract the excess phosphorus electrons this creates a flow of negatively charged electrons from one layer to the other one layer loses electrons and becomes positive the other gains electrons and becomes negative creating 2 poles eventually all the gaps on the surface of. Is occupied the holes and the electrons are now to florida plant to migrate them with the sun comes in when some light hits the surface layer splits on one electron making a hold on to supply selection. The electron is attracted to the positive and the hole goes another electron from lower down to replace the one
American history from john hopkins and prisoners of war and politics of vengeance in the American Revolution which will be released this fall by the university of Pennsylvania Press. Articles in the journal and the new england quarterly and working on a project that is titled patrick henrys war the struggle for empire in the revolutionary west. Kellie Carter Jackson is from wellesley college. Out from university of Pennsylvania Press provides the first historical analysis exclusively focused on the tactical uses of violence among black activists. She is coeditor of race, politics and memory and featured in the History Channel documentary roots a history revealed which was nominated for an image award in 2016. Gideon cohnpostar the causes and consequences of economic voter intimidation in the late 17th century and the institute of American History and the andrew w. Melon foundation and the social Science Research council. And finally Felix Harcourt is from Austin College and his researc
Sun is actually good for us. Hello and welcome to in good shape do you know those people who protect themselves from the sun regardless of the weather because sun is bad it harms your body but on the other hand. The sun is good for you it booth your immune system it makes you happy as a Family Doctor i would like to prescribe you some but what are the dangers what is the right dosage and what are the side effects. When the weathers nice thomas folks prefer cycling to work he doesnt use u. V. Protection happy to expose himself to the sun at specific times of the day hes a professor of dermatology and convinced that the suns protective benefits also extend to our skin. When hes on a complete them i didnt if you avoid the sun completely and also use sun block because you dont take Vitamin Supplements your risk. In a serious vitamin d. Deficiency the Immediate Impact is on your bones with a higher risk of osteoporosis but it also affects health in general the risk of cancer increases for b
San jose tied its record for this date. And even right now we have temperature readings in at redwood city and its really, really hot out there. Its going to be hotter tomorrow. The next three days well have more of this heat and it will be even hotter than today. As a result of that, a heat advisory is in effect now and remains in effect for virtually all of the bay area until 7 a. M. Thursday and a heat warning is in effect for solano county. Ill show you how hot later on. All right. Thank you. The heat sent many people off to beaches and parks across the bay area despite recommendations to stay at home. Leann melendez spoke to people who said they just needed to get out. She joins us live from the roof at abc 7 studios. I love how you said it earlier, were all human. Thats right. Well, you know, let me just tell you to start out weve been all stir crazy. People have been working from home, theyve been attending classes from home, staying safe at home, but then you added today the he
People are still trying to adjust to the new night light in s San Francisco. One in three primary doctors are concerned about having to close their practice over covid19. A mild start to the weekend, but tomorrow it is all about rain moving to the bay area. The hour by hour forecast. Abc 7 news at 11 00 starts right now. Building a better bay area for a safe and secure future. This is abcws od eng. Im eric thomas. It looks almost like business at usual before the pandemic. Things are definitely picking up, maybe a little bit too much and the city has taken notice of the large crowds outside the bars. Lauren martinez has our story. Today was definitely the busiest i have seen on Chestnut Street. There is a lot more people coming out i feel like as the weeks progress. Reporter retails sales are up at California Wine merchant where they converted their window into a sanitizer station. This barrier helps. Im the only one in the shop. Were doing a lot of deliveries as well. People are extre