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.
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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844
The motion of a skateboarder along and above a ramp
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2
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654
Deriving the particle's motion using numerical integration
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5
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789
Circular motion, coin on a rotating disk
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2
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837
Angular velocity- A toy train rolls around a horizontal track
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8
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880
Energy stored in the steady state circuit
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7
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795
Solving Kinematics Problem: V_o & Max Height
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7
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2K
Additivity of thermodynamic potentials?
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1
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533
Two Forces Acting Simultaneously
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6
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833
Electric field of a finite linear distribution of charge
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18
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1K
Conversion factor when converting from SI to natural units
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1
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962
How do I calculate forces in a truss cross section?
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2
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693
Clausius' Theorem and Entropy
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8
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865
Circular argument? Justification of equipotential points
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16
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961
Is My Calculation of Work Along a Defined Curve Correct?
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4
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746
Thermodynamics of a Heat Engine - (First/Second Law)
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2
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648
Finding the distance of a peg so that a pendulum can circle around it
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2
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1K
Energy of springs connected in series and parallel
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13
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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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13
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1K
Relative electrical energy consumption for different light bulb color temperatures
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3
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692
Frequency of Reflected light in special relativity
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1
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582
Confusion about work done by a gas - Thermodynamics
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15
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Thermal exchange between warm object and ideal gas
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2
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873
Thermodynamics: Two gases in a container
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676
Show that the radius of the exoplanet is about 1/2 of Earth’s radius
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2
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866
Total Energy vs Average Energy (Thermo)
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11
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1K
Electric flux from line charge through plane strip
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7
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6K
Investigation into electric guitar pickups
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4
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3K
Electric field created by point charges
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6
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906
Confusion about applying Faraday's law to a circuit
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3
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956
What's the energy stored in a parallel plate capacitor?
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14
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1K
Mass Pulley and torque -- Confusion in this Atwood machine problem
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11
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1K
Derive Gravitational Force and Field between two identical rods
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502
A particle slides down a non-fixed hemisphere
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3
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859
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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762
Determine the type of measurement by classification
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2
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579
Rope tension problem: Mass hanging from a rope tied at an angle
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21
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1K
Potential in spherical shells
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2
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816
Internal Resistance Affect the Balancing Length in a Potentiometer?
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12
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1K
Robot starts to overturn when reaching to pick up a load
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2
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633
Distance rolled of sphere vs cylinder with same m, r, and v
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5
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840
Determine energy required to stop rolling mass
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10
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771
Required force for sphere start rolling
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2
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777
Conservation of String Exercise
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5
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752
Reflection and Transmission of String Waves
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8
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1K
Tension in a rope hanging between 2 trees
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24
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1K
How do I calculate the Tension in a rope going over a smooth pulley?
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19
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Liquid rocket engine excercise
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1
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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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9
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Is the Trigonometric Analysis of Conveyor Belt Forces Correct?
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697
Gradient and Divergence in spherical coordinates
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Making a vehicle go straight on carpet
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8
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755
A Braking System with Spikes for Cars
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4
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784
Torque on a Circular Current Loop under a Misaligned Magnetic Field
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Rod with Current on Rails in Magnetic Field
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12
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2K
A problem in applying Kirchhoff's Voltage Law
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870
Body attached to a block by a spring, shaped like an inclined plane
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Ball revolving around a massive disc and a cube placed at centre
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1
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833
A cylinder rotating on a plane with friction and then moving across a frictionless plane to a collision
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1
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871
Finding the intermediate height of a ball in terms of its maximum height
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3
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881
Time taken for a planet to collide with the Sun
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10
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890
Why is there no current flow in the middle branch? (Circuits problem)
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Temperature dependence of resistance
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Find the density of surface charges at the boundary of two conductors with different resistivities
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Trying to tie two runners of different speeds over a race
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Can Energy Conservation Solve the Angular Velocity Problem?
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853
How do we represent a triangle wave for input voltage in this circuit?
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3
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Why is Radial Acceleration Ignored for a Rotating Board?
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Concept of different accelerations on rotations of rigid bodies
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10
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952
Relativistic Decay and Separation Between Moving Nuclei A and B
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658
Looking for observed rotation periods of various Foucault pendulums at different latitudes
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6
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Textbook 'The Physics of Waves': Varying Force Amplitude
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1K
Expression for magnitude of the constant friction force
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1K
Energy conservation equation to find equation for final velocity
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How Many Eggs to Turn a 40lb Flywheel in a Vacuum?
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Effect of rim width on a frisbee's stability and range
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755
Rocket + Connected Body Dynamics problem
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Quantum Mechanics Boundary conditions
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3
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787
Uncertainty in particle position
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3
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612
Reflection probability in Quantum Mechanics
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2
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650
Why is the direction of kinetic/static friction up a ramp?
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1K
Heated gas pushing a mercury column out of a cylinder
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926
Temperature of two subsystems at equilibrium
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Doppler Effect Question: Flying Bat Echolocating a Mosquito
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Final momentum of box with reflective interior hit by ideal laser
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Explain why applying different forces to objects of different masses result in different accelerations
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Incandescent Bulb - suitable approximation for voltage-current curve
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Diophantine equations and physics
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Underground cables faulty point detected
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24
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Motion of an electron inside the cavity of a charged sphere
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How to solve this driven RLC circuit?
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Electrostatics and current problem with 3 metallic balls
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How to set up this problem with driven torsional oscillator?
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Find the mass of odium for both solid and liquid state
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Find the final temperature of the combined honorite and odium?
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774
Difference between maximizing amplitude by choosing omega_0 given omega_d versus choosing omega_d given omega_0.
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937