كتاب سيروي فيزياء الفصل السابع Physics for Scientists and Engineers chapter 7 كجزء من كورس شامل لحل معظم المسائل مع شرح مختصر للدروس serway حل.
Physics for Scientists and Engineers chapter 7 energy
الفيديو جزأ من كورس على يوديمي
https://physicsbyehab.com/General_Physics_1
- شرح و حل لميكانيكا الحركة الانتقالية
- الكورس أكثر من 19 ساعات شرح و حل لأكثر من 100 مسألة سيروي
- حل أهم و اصعب مسائل الفصول من الفصل الثاني إلى التاسع
المسألة بالانجليزية
Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is one kilocalorie, defined as 1 kcal = 4 186 J. Metabolizing one gram of fat can release 9.00 kcal. A student decides to try to lose weight by exercising. She plans to run up and down the stairs in a football stadium as fast as she can and as many times as necessary. Is this in itself a practical way to lose weight? To
evaluate the program, suppose she runs up a flight of 80 steps, each 0.150 m high, in 65.0 s. For simplicity, ignore the energy she uses in coming down (which is small). Assume that a typical efficiency for human muscles is 20.0%. This means that when your body converts 100 J from metabolizing fat, 20 J goes into doing mechanical work (here, climbing stairs). The remainder goes into extra internal energy. Assume the student’s mass is 50.0 kg. (a) How many times must she run the flight of stairs to lose one pound of fat? (b) What is her average power output, in watts and in horsepower, as she is running up the stairs?
*ملف حل المسألة*
https://drive.google.com/file/d/1_4dGUJg6Y6OWZUh7Lo5tIlCWULyzKiso/view?usp=sharing
*ملف حل كل المسائل*

المسائل تشمل
- الفصل الثاني كتاب serway : Motion in One Dimension
- الفصل الثالث كتاب serway : Vectors
- الفصل الرابع كتاب serway : Motion in Two Dimensions
- الفصل الخامس كتاب serway : The Laws of Motion
- الفصل السادس كتاب serway : Circular Motion and Other Applications of Newton’s Laws
- الفصل السابع كتاب serway : Energy and Energy Transfer
- الفصل الثامن كتاب serway : Potential Energy
- الفصل التاسع كتاب serway : Linear Momentum and Collisions
physics 101
physics 01
physics 103
General physics
فيزياء 101
فيزياء 1
فيزياء 103
فيزياء عامة