البحث عن استفسار: ٦٤٩

المحاكاة

• Energy Skate Park: Basics (HTML5)
• Masses and Springs (HTML5)
• معمل البندول (HTML5)
• إشعاع الجسم الأسود (HTML5)
• إضافة المتجهات (HTML5)
• الإنتشار  (HTML5)
• الاحتكاك (HTML5)
• الانتقاء الطبيعي (HTML5)
• الجاذبية والمدارات (HTML5)
• الحركة في بعدين
• الرجل المتحرك
• الرنين الميكانيكي
• العزم
• الكتلة والزنبرك: أساسيات (HTML5)
• الكتل والزنبرك
• المتفاعلات والنواتج والمخلفات (HTML5)
• الملقط
• المناطيد والطفو
• المنحدر
• الميكروويف
• تفاعلات قابلة للعكس
• تمثيل الاتزان (HTML5)
• حالات المادة: الأساسيات
• حركة المقذوفات (HTML5)
• خصائص الغاز (HTML5)
• دوران الخنفساء
• قانون هوك (HTML5)
• لعبة الهوكي الكهربائية - مستلة من عمل روث تشابي
• مبادئ القوة و الحركة (HTML5)
• مختبر قوة التجاذب: أساسيات (HTML5)
• مركبة الهبوط القمرية
• معمل قوة الجذب (HTML5)
• موجات الراديو
• موجة على وتر (HTML5)
• الطفو (HTML5)
• حساب التفاضل والتكامل (HTML5)
• نظامي الشمسي (HTML5)
• الطاقة في منتزه التزلج (HTML5)
• الطفو: المفاهيم الأساسية (HTML5)
• مختبر التّصادُم (HTML5)
• ضغط السائل والتدفق
• القوى، بعد واحد
• القوى والحركة
• Fourier: Making Waves
• فورييه: صنع الأمواج (HTML5)
• قوانين كبلر (HTML5)
• حركة الخنفساء (ثنائي البعد)
• لعبة المتاهة
• الجزيئات والضوء (HTML5)
• Normal Modes
• مختبر بيانات المقذوفات (HTML5)
• توزيعات العينات للمقذوفات (HTML5)
• Quantum Wave Interference
• Radiating Charge
• منحدر: القوى والحركة
• جون والكهرباء الساكنة
• جولة في حساب المثلثات (HTML5)

الأنشطة

• Get in Motion!
• 2D Motion
• Forces & Motion: Basics HTML5 - Part 2 (Friction)
• 3 Activities for Kepler's Laws of Planetary Motion
• Forces and Motion
• Forces and Motion: Balanced and Unbalanced Forces, and Predicting Changes in Motion (Inquiry Based)
• Testing Predictions for Projectile Motion
• A Projectile Motion-Introduction (Inquiry Based)
• Projectile Motion
• Forces and Motion activity 1: Predicting speed and directions changes (Inquiry Based)
• Forces and Motion: Finding the Mass of a Car
• Projectile motion - Lab Report
• Quadratic Functions for Projectile Motion
• Forces and Motion: Tug O' War
• Ladybug Motion 2D Vector controls for circle/elliptical motion (inquiry based)
• Forces and Motion Lesson
• Ramp Activity 1: Using free body diagrams for motion on an incline (Inquiry Based)
• Projectile Motion Worksheet
• Projectile Motion Lab Report
• Ladybug Revolution activity: Exploring rotational motion (Inquiry Based)
• Gravity and Orbits
• Force and Motion activity 2: Relating graphs and free body diagrams using Moving Man and Forces 1D (Inquiry Based)
• Ladybug Motion in 3rd Grade
• Friction demonstration
• Student Guide for PhET - Forces Motion in html5
• Experimental Design: Projectile Motion!
• Math in Motion
• Ramp Activity 2: Calculating Net force on an incline (Inquiry Based)
• Moving Man, elementary
• Air Resistance Lesson
• The Maze Game
• Phet Forces and Motion Basics: Friction lab
• The physics of the triple jump
• Games in Net Force
• Math in Motion - Tasks
• Energy, Forces, and Motion basics
• Maze Game 2: Vector controls for circular motion (Inquiry Based)
• Projectile motion
• Pendulum Lab 1: Intro to pendulum (Inquiry Based)
• projectile motion
• projectile motion
• project motion
• Exploring Projectile Motion
• Projectile Motion Investigation
• Projectile Motion
• Projectile Motion Exploration
• Ramp: Forces and Motion Investigation
• Projectile Motion
• projectile motion
• Projectile Motion
• Projectile motion
• Projectile Motion
• projectile motion
• projectile motion
• Projectile motion
• Algebra-based Physics Semester one lessons, clicker questions, and schedule in pdf (Inquiry Based)
• Projectile motion experiment
• projectile motion
• Projectile motion
• Projectile Motion
• projectile motion worksheet
• Projectile Motion Lab
• Motion in Two Dimensions
• Projectile Motion
• projectile motion
• projectile motion
• Projectile motion lab report
• Projectile motion worksheet
• Projectile Motion Worksheet
• Horizontal Projectile Motion
• Projectile Motion
• Force and Motion: Basics
• Projectile Motion (Lab Report)
• Projectile Motion (HTML5)
• Intro y laboratorio virtual de Tiro Parabólico
• Projectile Motion Simulator
• Projectile motion
• Projectile Motion
• Projectile Motion
• Kinematic Equation Activity
• Quantitative Predictions of Projectile Motion
• Projectile Motion
• Projectile motion, range, time, velocity
• projectile motion
• Projectile Motion Worksheet
• Projectile Motion
• Projectile Motion
• Regents Physics- Projectile Motion Intro
• Projectile Motion
• Projectile Motion
• Projectile Motion
• Force and Motion Sim Activity
• Projectile Motion
• Projectile Motion
• Maze game: 2 activities in pdf (Inquiry Based)
• Projectile Motion Experiments
• projectile motion
• Prediction Sheet for Linear Motion
• Force and Motion
• projectile motion
• Projectile Motion
• projectile motion
• projectile motion
• Projectile Motion
• Projectile motion
• projectile motion
• Projectile Motion
• Projectile Motion
• Projectile Motion
• projectile motion
• Forces & Motion
• projectile motion
• projectile motion
• Projectile Motion Scientific Enquiry
• 3 Projectile Motion Factors
• Projectile Motion (#lab)
• forces and motion basics
• Forces and Motion activity questions
• Projectile Motion
• Projectile Motion - developing understanding.
• PHET Motion & Friction Sim Lab
• Projectile Motion Lab Report
• Projectile motion
• Projectile Motion Worksheet
• projectile motion worksheet
• Force and Motion: Mass vs. Speed
• Investigating Projectile Motion
• projectile motion experiment
• 2D Motion Activity
• Projectile motion lab activity
• PROJECTILE MOTION LAB REPORT
• projectile motion simulation
• Projectile motion lab
• Projectile Motion Simulator Worksheet
• Projectile motion
• projectile motion
• Projectile motion
• Projectile Motion
• Forces and Motion: Basic - Concept Introduction
• Friction and Motion
• projectile motion
• Exploring Vectors and Projectile Motion
• Projectile Motion - Lab Experiment
• Projectile Motion Experiments
• Projectile Motion - Physics 1 Lab
• Projectile Motion (Anwar Mabrouk Al-Talha)
• Projectile Motion
• projectile motion
• Projectile Motion
• motion along straight line with constant acceleration
• Conservation of Energy 1: Introduction (qualitative approach)
• Kinetic Molecular Theory- Introduction (inquiry-based)
• Conservation of Energy 2: graphs analysis
• Maze Game 1: Using vector representations to move through a maze (Inquiry Based)
• Forces and Motion
• Fuerzas en una rampa (actividad de indagación)
• Ramp Middle School Inquiry
• Projectile motion and horizontal component of its velocity
• Projectile Motion Discovery
• Projectile of motion - time of flight (horizontal projectile)
• Inquiry Projectile Activity
• Projectile Motion Virtual Lab Activity
• Projectile Simuation
• projectile motion hanan
• SBL-Projectile Motion
• Free-Fall and Projectile Motion
• LEARNING AND SIMULATING PROJECTILE MOTION
• Horizontal Projectile Motion Experiment
• Horizontal Projectile Motion
• Projectile motion
• Projectile Motion
• Projectile Motion
• Projectile Motion
• Projectile Motion Experiment Abdulla
• Forces and Motion- Effects of Forces on Motion (Investigation)
• Maze Game II (circular motion)
• Force and Motion
• Forces and Motion:
• Projectile motion
• projectile motion
• Newton's Second Law
• Projectile Motion ( including air resistance )
• Projectile Motion - Fired at an Angle
• forces and motion elhaam
• Projectile Motion Lab Report
• Projectile Motion
• Projectile motion
• Lançando Projéteis no "Projectile Motion (HTML5)"
• Projectile Motion - Physics 1 lab experiment
• Motion Lab Report
• Lab 3 - Force and Motion
• Rotational Motion
• Horizontal Projectile
• projectile motion
• Projectile Motion
• Projectile Motion
• Motion Graphs
• Projectile Motion Homework
• Projectile Motion in Sports
• Projectile Motion Lab Report
• Projectile motion lab report
• Forces and Motion
• projectile motion
• Kinetic Molecular theory review
• Explorando el movimiento parabólico
• Rules for Forces
• La fisica del salto triplo
• A física do salto triplo
• Projectile investigation for Middle School
• Quadratic Projectiles
• La physique du triple saut
• Types of Forces Investigation
• Lluvia de Malvaviscos.
• La Física del salto triple
• Explorando la trayectoria de un proyectil
• TIRO PARABÓLICO-FÍSICA.
• Motion and Moving Man Simulation Homework
• PhET Projectiles Simulation Lab
• Moving Man (Inquiry Based)
• Newton's Second Law of Motion
• Forces, Friction and Motion
• projectil motion lab report form
• Calculus Grapher: Relating motion graphs to calculus graphs
• FORCES AND MOTION WITH WORK ENERGY
• Projectile motion – Complementary Angles and Range
• Force and Motion
• Projectile Motion Investigation
• Worksheet
• Projectile Motion-Using kinematic equations
• Queda Livre no "Projectile Motion (HTML5)"
• Comparing Speed and Angle to projectile distance
• Introduction to Projectile Motion
• Projectile Motion Experiment
• Projectile Motion: Gravity & Air Resistance
• Intro to Rotational Motion
• Lançamento Horizontal de Projéteis no "Projectile Motion (HTML5)"
• projectile mothion
• Newton's 1st & 2nd Laws
• projectile motion
• projectile Motion
• project motion
• projectile motion
• Projectile motion
• Projectile motion
• Projectile Motion
• Projectile Motion
• projectile motion
• Projctile motion
• Projectile Motion
• Projectile Motion Lab #2
• Impulso no "Forces and Motion: Basics (HTML5)"
• Lançamento Vertical de Projéteis no "Projectile Motion (HTML5)"
• Free fall
• RGB Color
• Velocidade e Aceleração no Lançamento de Projéteis no "Projectile Motion (HTML5)"
• motion along straight line with constant speed
• Forces and Motion Basics Interactive Activity
• Forces and Motion - Friction and Free Body Diagrams
• Modelling Motion
• Projectile Motion: The Basic Flight Path
• Position function of mass on spring
• Net Forces and Newton's Second Law
• Friction
• Gravity: Friend or Foe?
• Moving Man
• States of Matter Basics - Clicker Questions
• Maze Game
• Moving Man - Velocity vs. Time Graphs
• Force and Acceleration
• Simple Harmonic Motion
• Oscilatory Motion
• Simple Harmonic Motion (Pendulum & Spring)
• Projectile
• (Lab Report
• Projectiles Air Resistance - It's a Drag
• Projectile motion Experiment
• Projectile Motion Lab Exploration
• Projectile Motion and Air Resistance
• projectile motion worksheet
• Understanding Projectile Motion
• Horizontal Projectile Motion Lab
• Project motion worksheet
• Projectile Motion report
• Horizontal projectile motion
• Moving Man (Motion Intro)
• Forca dhe levizja 2
• Ramp lab
• Ley de Masa
• Preguntas desafiantes sobre el segundo principio de Newton
• Kinematics
• Motion Labs using MOVING MAN
• Guided Discovery (Chinese/English) for Freshman University Physics: 1. Kinematics
• Time of flight related to initial speed in a horizontal projectile.
• Projectile Motion Phet Simulation Activity
• Projectile Motion--Horizontal and Full Trajectory
• Projectile Lab (Horizontal Launch)
• Projectile Lab (Angled Launch)
• Simple Harmonic Motion & Springs
• Forces and Motion: Basics Dutch
• Introduction to rotational motion
• Force and Motion Investigation
• Forces and Motion: Friction
• Change Your Motion
• Projectile worksheet
• Pushing Things Around
• Corona vírus vs lançamento de projéteis
• Fee Fall
• Projectile Motion Formal Lab Development and Report
• AP Physics PhET Projectile Motion Lab
• 2ª Lei de Newton e Força de Atrito no "Forces and Motion: Basics (HTML5)"
• Investigating Climate Change at the Macroscopic and Microscopic Level
• friction
• Hooke's Law and Simple Harmonic Motion
• Investigating Forces and Motion Through Inquiry
• Forces and Motion with Friction Group Activity
• Force and Motion Basics - Second grade
• Greenhouse gases - sense making by observing photons
• Investigating Data Sets and Intro to Bootstrapping using PhET embedded in CODAP
• Molecules and Light-inquiry for high school
• Entropy, Microstates, and Probability - Interactive Lecture Demonstration Guide
• Forces Simulator Activity
• Second Law Inquiry PhET Forces and Motion
• Projectile Parabolas
• Pendulum Lab
• Guided Discovery (Chinese/English) for Freshman University Physics: 2. Newtonian Mechanics
• Balanced and Unbalanced Forces - What Causes Acceleration
• Gravity and Orbits Investigation
• Intro Lab
• 1 Dimensional Motion - Kinematics and Graphing
• Energy Transformations
• Describing Location and Movement
• Movimento Retilíneo Uniforme (MRU) no "Forces and Motion: Basics (HTML5)"
• Movimento Retilíneo Uniformemente Variado (MRUV) no "Forces and Motion: Basics (HTML5)"
• Força, Massa e Aceleração (Básico) no OA "Forces and Motion: Basics (HTML5)"
• Mr. (Moving Man)
• Moving Man Motion Graph Review
• Faraday Experiment Self Directed Learning
• Crash!
• conservation of mechanical energy
• Introduction to Forces and Newton's Laws
• The "Lifelike" Moving Man: Variation in motion graphs
• Galileo's Skater Down an Inclined Plan
• Movimiento Armonico Simple: El pendulo y el resorte (Simple Harmonic Motion:pendulum and spring
• free fall
• Moving Man Activity
• Force introduction
• Wave Motion
• Investigate the Energy of a Pendulum
• Kepler's Laws and Orbits
• Intermolecular Forces and Molecules - Interactive Lecture Demonstration
• Newtons 1. und 2. Gesetz
• PhET Forces Lab
• Unusual cases of oscillation
• Oscillate Waves and Wavelengths
• Student Guide for PhET - Gravity and Orbits
• Student Guide for PhET - Reactants, Products and Leftovers in html5
• Student Guide for PhET - pH Scale in html5
• Student Guide for PhET - Balancing Chemical Equations in html5
• Student Guide for PhET - Ohm's Law in html5
• Student Guide for PhET - Molarity in html5
• Student Guide for PhET - Molecule Shapes in html5
• Student Guide for PhET - Concentration in html5
• Student Guide for PhET - Build an Atom in html5
• Student Guide for PhET - Acid Base Solutions in html5
• Student Guide for PhET - The Moving Man (JAVA) student guide
• Student Guide for PhET - Balancing Act in html5
• Student Guide for PhET - States of Matter in html5
• Video: Self-paced Investigation on Simple Harmonic Motion of a spring-mass system
• Video: Self-paced learning - Moving Man Simulation (Motion Graphs)
• Balancing Act Remote Lab
• Roller Coaster Physics Investigation
• Discovering Newton's Second Law
• Memprediksi gerak benda dengan analisis Hukum Newton (Inkuiri)
• Understanding Planetary Motion using Kepler’s Laws
• Pendulum Lab
• Diffusion Exploration
• conservation of mechanical energy
• Moving the Man
• Applications of Sinusoidal Functions
• Moving Man guided inquiry
• Moving Man Questions
• ปฏิบัติการเรื่องกฎของฮุคและการเคลื่อนที่แบบSHM
• Activity sheet_Resonance
• Ladybug Activity
• Investigating the Parameters of Circular Orbits
• Moving Man: Anayzing Graphs
• The Simple Pendulum- What affects the Period of the pendulum?
• Energy Skate Park Student Simulation
• Constant Acceleration Motion
• Satellite Motion Lab
• uniformly accelerated motion
• Guided Discovery (Chinese/English) for Freshman University Physics: 5. Introduction to Waves
• LKPD Mengenal Gerak: Hukum Tersembunyi di Balik Dunia Fisik
• Orbits--effects of mass and distance
• Walker Lab with Moving Man sim
• Sources of Variability - Investigating Projectile Data Lab
• Modeling Paradigm Lab- 2nd Law
• Determination of angle of projection for maximum range
• Tir parabòlic
• Movimento de projéteis
• Horizontal Release Projectile Relationships
• Lançamento de projétil
• Teorema da energia cinética
• Atividade de Lançamento Oblíquo
• Projectile Investigation
• Lançamento Oblíquo
• HOJA DE ACTIVIDADES - Análisis del Movimiento Parabólico Sin Resistencia del Aire
• Força de Atrito
• HOJA DE TRABAJO
• Movimeinto de Proyectiles
• Der gerade Wurf
• Horizontal Launch Investigation
• Lançamento de Projéteis
• projectile
• Projectile
• projectile
• Modeling a linear simple harmonic oscillator
• Plan de clases - Lanzamiento de proyectil
• Lançamento Vertical no PhET
• PHET Free Fall Lab
• Motions Air resistance
• Movimiento Parabolico. Comaparacion de datos
• Composició de moviments. Moviment parabòlic. PhET
• Air Resistance
• Laboratorio Movimiento parabólico con Phet y Graph
• Laboratorio de movimiento de proyectiles con simuladores PhET
• Projectile launch angle vs displacement
• Movimiento Parabolico
• Projectile Guided Inquiry
• ESTUDIO Y OBSERVACIÓN DEL MOVIMIENTO DE UN PROYECTIL
• Friction Investigation
• Launching Pumpkins - Solving Quadratic Functions
• Lançamento de projéteis
• Lançamento Oblíquo Inicial
• Phase Changes using States of Matter Sim
• Atividades sobre o movimento dos corpos
• Forças em Ação
• Fuerza y Movimiento
• Gamificação da Força e movimento
• Force and Acceleration
• Compendio de Actividades e ILDs basadas en simulaciones PhET
• Cinemática (Atividades) nos OA's do PhET
• Atividade de Força e Movimento
• Moving Man Simulation Activity
• Balancing Act
• Balancing Act
• Energy Skate Park: Basics
• Concept questions for Physics using PhET (Inquiry Based)
• Introduction to oscillations and SHM
• Refraction and Snell's Law
• Basics of Electricity
• Pendulum Lab COV Investigations
• Lady Bug Revolution Activity
• Newton's Laws and the Lunar Lander
• Factors Affecting The Frequency of A simple Harmonic Oscillator
• Constant Velocity & Uniform Acceleration with the Moving Man
• Kracht en beweging
• Qüvvələr və Hərəkət
• 2nd Law Simulation Lab
• qüvvə və hərəkət
• Friction Investigation
• 2. Newtonov zakon
• Kracht en Beweging. Google Quizen
• Forces and Free Body Diagram Lab
• Kracht en versnelling klas 3 vwo
• Preguntas conceptuales
• Forca dhe levizja 1
• Applications of Parametric Equations
• Linear and Quadratic Functions: analysis using graphing
• Applied Forces and Friction and a Review of Newton's 1st and 2nd Law
• Friction and Acceleration
• OSNOVNI ZAKON GIBANJA
• Forces i moviment
• mesues
• Friction on Incline
• Qüvvələr və Hərəkət Əsasları
• Student Worksheet based on Inquiry Newton's Second Law
• Tug Wars: May The Forces Be With You!
• Middle School Science
• Forças e movimento: Noções Básicas
• 2. NEWTONOV ZAKON
• Net force
• MOVIMENTO CIRCULAR UNIFORME
• Determine the static and kinetic coefficients of friction
• Friction Quantitative Lab
• Acceleration
• Leis de Newton e Movimento
• Introduction to Net Force
• Força de Atrito
• Guia de trabajo - Movimiento Mariquita 2D
• Introdução as Leis de Newton
• Primeira e Introdução à segunda Lei de Newton
• CDI_ Fuerzas y Movimiento
• LEYES DE NEWTON Y FUERZAS DE ROZAMIENTO
• Força e movimento
• Leis de Newton
• Mjerenje sile trenja
• Fuerza Neta y Movimiento
• Forces and Newton's Laws Review
• Primera Ley de Newton
• Krachten als oorzaak van versnelling en wetten van Newton
• Jugando al Tira y Afloje
• Werkblad simulatie kracht en beweging klas 2
• Forces Tug of War
• Laboratorio de Dinamica lineal
• Milk Trucks
• Descubriendo la 1ª ley de Newton
• Calculating the Acceleration
• Video: Self-paced learning on Newton's Second Law
• La fuerza
• Investigating Net Force
• friction and acceleration
• Guia de trabajo - Fuerza y Movimiento: Intro
• Force
• Force, Mass, Acceleration
• Hoja de Trabajo-Fuerzas y Movimiento
• Newton's Second Law Investigation
• Werkblad simulatie Kracht & Beweging
• Video: Self-paced learning on Newton's First Law
• Investigation
• UNIDAD1 S4 L11 Suma de fuerzas colineales
• Fuerza de Rozamiento
• Effectuer une simulation laboratoire
• Net FOrces
• Experimenting with forces (CER)
• Forces Virtual Lab Ramp
• How does mass effect the speed of a forced object?
• motion along straight line with constant speed
• Simple Harmonic Motion Virtual Modeling Lab PhET
• Space Cadets Lunar Landing Showdown
• Moving Man: Simple Acceleration
• Physics Lab Worksheet Momentum.docx
• Electric Field Hockey Homework
• Experimental Design with Forces
• Waves on a string
• Statics and Voltages
• PhET Inquiry - Bending Light
• Trip to Mars
• PhET Inquiry - Bending Light
• Guided Inquiry - Electric Fields
• PRACTICAS DE SIMULACIONES
• Light Emission and Lasers
• Estática en el balancín: Fuerzas y momentos
• Introducción a la Física: medidas, unidades y relación entre variables
• Work Energy on a Ramp
• Intro to Circuits
• 大一物理引導式自我發現 (中文/英文): 動力學 (牛頓定律)
• Moving Man
• States of Matte Inquiry
• 8th Grade Science teacher
• Conservation of Mechanical Energy
• Exploring Static Electricity
• Writing an Equation for the Wave
• Group data generating activity to find Lac Operon effectiveness
• Energy Simulation Lab - Skate Park
• 大一物理引導式自我發現 (中文/英文): 運動學
• Mecânica (Atividades) nos OA's do PhET
• การทดลองOnline 1 เรื่อง ลูกตุ้มนาฬิกาอย่างง่าย
• simple pendulum lap
• Simple Pendulum
• Balanced & Unbalanced Torque Webquest
• Spring Mass Experiment
• Moving Man with Position and Velocity graphs
• Dynamics (Gr11) Unit End Exploration
• Dinâmica (Atividades) nos OA's do PhET
• FREE Auto-Graded PhET Activities on Quizizz
• Pendulum Energy
• Vector Addition Worksheet
• PhET Simulations Aligned for AP Physics C
• Earth and Space Science Gravity Exploration Lab
• Moving Man Multiple Representations
• THE MOVING MAN: DISTANCE, DISPLACEMENT, SPEED & VELOCITY
• Turning Forces
• States of Matter - Lab Simulation - student procedures and questions
• Phet Simulation - Gases Intro Worksheet
• NGSS Alignment Doc for Middle School targeted PhET Sims
• Moodle et PhetColorado
• Forces in 1 Dimension
• How do PhET simulations fit in my middle school program?
• Alignment of PhET sims with NGSS
• Wave pre-lecture introduction for regular level
• How can sound waves cause a window to shake?
• POGIL-style simulation analysis
• Predicting the impact point in horizontal launch simulations
• Energy Skate Park Lesson
• Hooke's Law, Spring Constant, and Energy HONORS
• PREPARATORIA: Alineación de PhET con programas de la DGB México (2017)
• Electric Field Hockey Post-Game Analysis
• Mapping of PhET and IBDP Physics
• MS and HS TEK to Sim Alignment
• SECUNDARIA: Alineación PhET con programas de la SEP México (2011 y 2017)
• Preguntas de razonamiento para todas las simulaciones HTML5