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#ماهواره

ماهواره‌های اطراف زمین :
انواع مدار بر اساس ارتفاع:
مدار پایین (LEO): 160 تا 2000 کیلومتر
مدار میانی (MEO): حدود 2000 تا 35,786 کیلومتر
مدار زمین‌ثابت (GEO): حدود 35,786 کیلومتر
ماهواره‌های مدار پایین (LEO):
سرعت بالا، چرخش سریع به دور زمین؛ مناسب برای اینترنت، هواشناسی و عکسبرداری دقیق.
ماهواره‌های مدار میانی (MEO):
بیشتر برای سیستم‌های GPS و ناوبری استفاده می‌شوند؛ پوشش گسترده‌تر نسبت به LEO دارند.
ماهواره‌های مدار زمین‌ثابت (GEO):
در یک نقطه ثابت نسبت به زمین قرار دارند؛ مناسب برای تلویزیون، مخابرات و پیش‌بینی وضع هوا.
ویژگی عمومی ماهواره‌ها:
دارای پنل خورشیدی، سیستم ارتباطی، منبع تغذیه، و ابزارهای خاص برای مأموریت خود هستند.
@physics_school

آموزش فیزیک دبیرستان: مهندس سعید نمازی
#ماهواره

ماهواره‌های اطراف زمین :
انواع مدار بر اساس ارتفاع:
مدار پایین (LEO): 160 تا 2000 کیلومتر
مدار میانی (MEO): حدود 2000 تا 35,786 کیلومتر
مدار زمین‌ثابت (GEO): حدود 35,786 کیلومتر
ماهواره‌های مدار پایین (LEO):
سرعت بالا، چرخش سریع به دور زمین؛ مناسب برای اینترنت، هواشناسی و عکسبرداری دقیق.
ماهواره‌های مدار میانی (MEO):
بیشتر برای سیستم‌های GPS و ناوبری استفاده می‌شوند؛ پوشش گسترده‌تر نسبت به LEO دارند.
ماهواره‌های مدار زمین‌ثابت (GEO):
در یک نقطه ثابت نسبت به زمین قرار دارند؛ مناسب برای تلویزیون، مخابرات و پیش‌بینی وضع هوا.
ویژگی عمومی ماهواره‌ها:
دارای پنل خورشیدی، سیستم ارتباطی، منبع تغذیه، و ابزارهای خاص برای مأموریت خود هستند.
@physics_school
hottg.com/physics_school/15562
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آموزش فیزیک دبیرستان: مهندس سعید نمازی





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How Does Bitcoin Work?

Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”

#ماهواره

آموزش فیزیک دبیرستان: مهندس سعید نمازی TG
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