Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Derivation process of Selection Rule of hydrogenic atom
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A question about the perpendicular vector
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Trouble understanding frames in relativity
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Why does the PE of particles during steam condensation decrease?
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Torque on a sign hung by a hinge
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Acceleration of a ball at its max height after being thrown upwards
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Oscillation of fluids in a U tube
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A microwave oven of mass 13.0kg is pushed a distance 8.80m up a ramp
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Free-body diagram: Spring-loaded cylinder sliding on a metal rod
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A 2.8-kg block slides over the smooth icy hill -- Find the minimum speed to clear the pit
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A household fridge removes heat, determine power the fridge draws
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Find h in the problem involving a stone thrown upwards
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Voltage-resistance graph for this circuit with a variable resistance
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Work done by a balloon that is rising
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Coefficient of friction of a sandwiched body
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Kinematics, is this a poorly worded question?
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1K
Efficiency of Stirling Cycle - Is it the same as the Carnot Engine?
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Circular motion and moment of inertia - circle loop
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Pressure question: Weight of a car calculated from tyre contact patch area
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Ionic thruster high school science project
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1K
Rolling without Slipping Demo
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1K
RCL series circuit analysis: Damping Constant
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Electric field of a charged disc with a small circle cut out of it
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Block tied to a fixed string on an accelerating wedge
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Use of imaginary charge vs Gauss' law
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Relation between the velocity vector and the acceleration vector of an object
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Issue deriving the third law of thermodynamics
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First Law of Thermo: Audience body heat warming a concert hall
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25
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Rotational Dynamics problem with instantaneous frame of reference
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6
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975
Distribution of Energy when work is done on a system of 2 masses connected by a spring
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17
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What Does -∂V/∂x Represent in Newton's Law?
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How to approach this question using SUVAT equations?
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Confused about kinematic equations
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What is the relationship between tire size and pressure changes?
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Moment of Inertia of Solid Sphere - Proof
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Reading of Ammeter for this circuit with Voltage Controlled Resistors
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Relation between Friction, Velocity, and Acceleration
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Is this statement acceptable? (time derivative of a rotating vector)
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Entropy Change For Van Der Waals Gas
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5
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Maximum Power dissipated at load resistor
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Poiseuille law and friction force help
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829
Reversible, adiabatic expansion - Entropy Change
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1K
Linear momentum but quadratic kinetic energy?
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Are there two downward forces acting on the pivot of the rotating rod?
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Thermodynamics: Violating Clausius => Violating Kelvin
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The motion of a skateboarder along and above a ramp
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Deriving the particle's motion using numerical integration
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Circular motion, coin on a rotating disk
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Angular velocity- A toy train rolls around a horizontal track
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Energy stored in the steady state circuit
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7
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Solving Kinematics Problem: V_o & Max Height
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Additivity of thermodynamic potentials?
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Two Forces Acting Simultaneously
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Electric field of a finite linear distribution of charge
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Conversion factor when converting from SI to natural units
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How do I calculate forces in a truss cross section?
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Clausius' Theorem and Entropy
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Circular argument? Justification of equipotential points
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Is My Calculation of Work Along a Defined Curve Correct?
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Thermodynamics of a Heat Engine - (First/Second Law)
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Finding the distance of a peg so that a pendulum can circle around it
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Energy of springs connected in series and parallel
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The specific work done on an ideal gas during an adiabatic process in a piston-cylinder system
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Relative electrical energy consumption for different light bulb color temperatures
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Frequency of Reflected light in special relativity
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Confusion about work done by a gas - Thermodynamics
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Thermal exchange between warm object and ideal gas
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Thermodynamics: Two gases in a container
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Show that the radius of the exoplanet is about 1/2 of Earth’s radius
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Total Energy vs Average Energy (Thermo)
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Electric flux from line charge through plane strip
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Investigation into electric guitar pickups
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Electric field created by point charges
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Confusion about applying Faraday's law to a circuit
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What's the energy stored in a parallel plate capacitor?
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Mass Pulley and torque -- Confusion in this Atwood machine problem
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Derive Gravitational Force and Field between two identical rods
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A particle slides down a non-fixed hemisphere
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Two spring-coupled masses in an electric field (one of the masses is charged)
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Find the equivalent resistance of this circuit
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How Do I Draw a Decay Scheme in Radiochemistry?
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Determine the type of measurement by classification
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Rope tension problem: Mass hanging from a rope tied at an angle
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Potential in spherical shells
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Internal Resistance Affect the Balancing Length in a Potentiometer?
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Robot starts to overturn when reaching to pick up a load
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Distance rolled of sphere vs cylinder with same m, r, and v
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Determine energy required to stop rolling mass
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Required force for sphere start rolling
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Conservation of String Exercise
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Reflection and Transmission of String Waves
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Tension in a rope hanging between 2 trees
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How do I calculate the Tension in a rope going over a smooth pulley?
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Liquid rocket engine excercise
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Connecting a number of EMF sources in a circle to form a circuit
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Friction force on a ball falling through a body of water
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Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
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Gradient and Divergence in spherical coordinates
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Making a vehicle go straight on carpet
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A Braking System with Spikes for Cars
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