Chapter 5 : exercices and exam questions (probability)

Problem 1: A marketing survey indicates that 60% of the population owns an automobile, 30% owns a house, and 20% owns both an automobile and house. Calculate the probability that a person chosen at random owns an automobile or a house, but not both. (A) 0.4               (B) 0.5                     (C) 0.6               (D) 07              (E) 09 Problem […]

Chapter2: torque and angular momentum in circular motion

Definitions: the torque and angular momentum are defined as vector products of position, force and momentum. Suppose a forceacts on a particle whose position with respect to the origin 0 is the displacement vector . Then the torque “about the point 0 and acting on the particle,” is defined as: Now suppose the particle has […]

Chapter 1: uniform circular motion

When an object has a circular motion even though its speed is constant, it is nonetheless accelerating because according to newton’s 1st law: an object continues in its state of rest or uniform motion unless acted on by an external force. So if the object was to be free in space then of course it will […]

Atrial Fibrillation and Ventricular Fibrillation

Endocardial catheter system for Wavelength measurement, Mapping and ablation Inventor(s): ABDOLMOHAMMADI AKBAR (FR) Applicant(s):   ABDOLMOHAMMADI AKBAR (FR) Classification:  -international:      A61B18/14; (IPC1-7): A61B17/39                            -cooperative:        A61B18/1492 Application number:       WO1998IB01737   19981031 Priority number(s):          WO1998IB01737   19981031 Also published as:            EP1123046 (A1)    EP1123046 (B1)     CA2348558 (A1)                                              AU9554898 (A)      DE69835838 (T2)                 […]

گروه همیاری دانش اموختگان ایرانی مقیم اروپا

   -این گروه هیچگونه وابستگی به سازمان و یا دولت ویا تشکیلاتی را ندارد و تمامی مخارج ان از  کمکهای انسان   دوستانه تامین می شود .به همین دلیل توان مالی بسیار زیادی نداشته و تعداد معدودی بورس تحصیلی        در اختیار نوابغی که به علت فقر خانوادگی و یا هر دلیل دیگری قادر […]

Chapter 7 : Photosynthesis

                                 Photosynthesis Photosynthesis is the process that converts solar energy to chemical energy. Directly or indirectly, photosynthesis nourishes almost the entire living worlds -Autotrophs sustain themselves without eating anything derived from other organisms -Autotrophs are the producers of the biosphere, producing […]

Chapter 6 : cellular energy production

                                        AEROBIC WAY The citric acid cycle completes the energy yielding oxidation of organic molecules. In the presence of O2, pyruvate enters the mitochondrion. Before the citric acid cycle can begin, pyruvate must be converted to […]

Chapter 5 : bioenergetics

                         Introduction to bioenergetics Cellular respiration is composed of three topics: Redox reactions (oxidation-reduction) Electron transport chain Glycolysis In fact living cells require energy from outside sources. Some animals obtain energy by eating plants and some others feed on other organisms that eat plants, and […]

Chapter 1: sequences and series

     Sequences and series   Consider the following sum: The dots at the end indicate that the sum goes on forever. Does this make sense? Can we assign a numerical value to an infinite sum? While at first it may seem difficult or impossible, we have certainly done something similar when we talked about […]