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.
Depth of a basketball floating on water
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Keplerian Telescope and real image
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7
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Concept about photoelectric effect
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17
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Dynamic system of self balancing robot
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4
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Max inversion temperature for a gas (Dieterici’s equation of state)
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4
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Closed cycle of an ideal gas
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3
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Why is the tension in a massive cable always tangent to its portion?
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5
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Statistical mechanics: particles in magnetic fields
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2
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759
Calculating Magnetic Field at Point P for Perpendicular Current-Carrying Wires
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2
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Calculation of Ramp Jump Distance Using Projectile Motion Formulas?
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12
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Help with designing a power generating system
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3
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777
Max Impulse on a pendulum
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1
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Angle that makes kinetic and potential energy of simple pendulum equal
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2
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Introduce a battery to an LR circuit
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16
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Planar pendulum with rotating pivot
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7
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950
What Are the Assumptions and Calculations for Sheet of Charge Theory?
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1
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Cables, pulleys, 2 weights
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4
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833
Balmer series experiment
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2
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1K
Spherical pendulum confusion [Issue resolved]
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2
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718
Launch service between two stations along a flowing river
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21
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Book plots position & force on the same graph, still gets right answer
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8
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Why is source force + electrostatic force = 0 inside battery?
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10
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Relativistic motion and length contraction
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2
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44
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Circular motion doubt: Angular velocity vector for general planar motion about a point in the plane
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6
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933
Critical frequency of Faraday Waves?
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6
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Find starting velocity from golfer launching ball
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7
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876
Why is the electric field inside a conducting hollow/filled sphere zero?
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2
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973
Slope of N - t graph of radioactive decay
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2
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976
Question about Feynman diagram showing annihilation
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4
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936
Coupled oscillator question
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2
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861
Tension in a Two-Crate System on a Frictionless Surface
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7
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959
Forces at play in a pendulum (conceptual doubt)
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7
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782
How do I fix the signs in Faraday's Law in RL Circuit?
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5
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Resistivity calculation from two-probe resistance measurement of sheet
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2
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844
Simple pendulum with moving support
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4
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Change in the unit vectors
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10
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940
Coupled pendulum-spring system
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3
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Field transformations in the z-direction
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7
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Pendulum attached to a rotating vertical disk
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2
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The value of the spring constant k that I calculate seems too high
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11
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Understanding the math of definition of electromotive force
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1
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Length of string in a standing wave
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19
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Field due to an electric dipole (Halliday & Resnick, Ch. 27 problem 23)
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3
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630
Understanding a very simply RL circuit
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Small oscillations of a simple pendulum placed on a moving block
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3
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5K
Lab Exercise: Measuring "g" using Conservation of Energy
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12
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Kinematics problem from a competition: Will the 2 sliding boxes collide?
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6
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881
Flashing light beacon from Earth reaching spaceship moving away at 0.75c
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5
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704
Rolling Sphere On Incline
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1
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920
Block sliding on a semicircular track with friction
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10
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2K
The maximum reversible work in thermodynamics (2)
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1
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912
Formula derivation connecting vertical water flowrate & horizontal distance moved by a suspended sphere
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7
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207
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Impulse and momentum / work-energy
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5
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988
The maximum reversible work in thermodynamics
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Do you graph the energy levels of a ##1s^1## atom the same as a ##1s^2## atom?
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Magnetic dipole moment and integration surfaces (Introductory Electromagnetics - Magnetistatics)
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4
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Charge on a grounded conducting sphere in a uniform electric field, after ungrounding and movement
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1
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Conservation of momentum (center of mass) in projectile launches
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15
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Range of frequency heard by observer related to Doppler effect
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8
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Vertical displacement with time of a projectile
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2
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48
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Spring Constant Force Problem Help
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996
Is current flowing into a battery always equal to current flowing out?
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Total Internal Reflection and Transmitted Wavelength
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Understanding self-inductance in a solenoid.
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3
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Condition for resolution of two point sources of light
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2
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934
How do I model this function? (Damped Harmonic Motion)
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19
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Emf in coil rotating inside magnetic field
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3
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990
Refraction of light when traveling from air to glass
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6
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Finding critical angle: not sure which one is correct
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13
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Origin of repulsive force on a magnet approaching conducting ring?
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A wheel of radius r rolls along a curve
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Electronic Circuits - Calculate voltage
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4
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Newton's third law and weight
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13
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Query related to Two-Dimensional Motion
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9
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Camera drone and speed of air below it
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5
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Graph of viscous force and velocity
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15
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Projectile motion, initial height and range given, find initial velocity
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8
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Need to derive a formula for the number of red giants
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8
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Question about time dilation
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22
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Derive trig equations 4, 5, and 6 from 1, 2, and 3
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13
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Friction - same direction as motion?
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Center of mass acceleration for an inclined plane and mass m
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18
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How Much Vertical Acceleration Does a Jet Need to Avoid a Hill?
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2
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717
How Does Coriolis Force Influence Particle Motion in Rotating Systems?
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3
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2 Masses attached by a spring in the vertical axis
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Minimum work done to push the cube over
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14
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Gauss' Law for a conducting / non-conducting sheet
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5
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Is the Charge Conservation Correct in This Meson Decay Feynman Diagram?
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Find the value of ##t## when ##P## returns to ##X##- Kinematics
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25
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Find the tension in the rope PQ
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7
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830
How Do You Correctly Cancel Angular Momentum in Physics Problems?
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Question about acceleration of free fall
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23
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Calculate voltage over capacitor and resistance
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7
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Solve the problem involving the velocity - time graph
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3
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Question about the energy of 2 blocks with a spring between them
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12
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952
How Is Work Calculated on a Conveyor Belt with Friction?
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Find the initial velocity ##U##
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3
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How Does Energy Transform in a Bungee Jump?
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7
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782
2 Masses and a Wheel (with mass)
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Horizontal force by block on a beam
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2
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45
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