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.
Ideal Gas HW Problem: Pressure at 11,000 meters?
  • Cuckooforcocoa
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Hooke's Law & Energy conservation
  • Ampere
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Two Transverse Sinusoidal waves combine in a medium
  • Willjeezy
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RC Circuits: Graph Homework - Determine Flash Frequency & Voltage Sketch
  • sunflowerzz
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Quadratic equation ball 72km/h
  • LDC1972
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Angular frequency=2*pi*frequency
  • pyroknife
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Basic torque fulcrum problem assitance needed
  • PsychonautQQ
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Find components of initial velocity given V & H displacement
  • -sandro-
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Confused with this negative average velocity
  • Suarden
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Find Free Charge Enclosed by Sphere of Radius R
  • zephyr5050
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How Do Capacitors Behave in Series and Parallel Networks?
  • sunflowerzz
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(Negative Average Velocity) Homework
  • Suarden
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Potential Of Negetive and Positive charges
  • andyrk
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What is the magnitude if the total force exerted by the four charges
  • pr_angeleyes
  • · Replies 11 ·
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Does the electric field reach a value equal to half its maximum value?
  • pr_angeleyes
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Is the Magnitude of Vector Addition Equal to the Sum of Magnitudes?
  • Matt_h
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Radioactive Source Emitting Only Alpha and Gamma Radiation
  • Molly1235
  • · Replies 3 ·
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Car Traveling the Circle - Kinematic Quiz
  • jtigers1
  • · Replies 8 ·
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The end of a ski jump(projectile motion)
  • babysnatcher
  • · Replies 12 ·
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Direct collisions on an inclined plane
  • Woolyabyss
  • · Replies 4 ·
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4
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Efficiency of a Light Bulb: Calculating Energy Transfer
  • Molly1235
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Gauss’s law can be used to show that the electric field at a given di
  • pr_angeleyes
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What is the energy density of the electric field ?
  • pr_angeleyes
  • · Replies 1 ·
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1
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What Is the Maximum Elongation of the Spring Between Two Moving Discs?
  • Saitama
  • · Replies 89 ·
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Stacked blocks pulled horizontally
  • judas_priest
  • · Replies 42 ·
2
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Why is the procedure for finding Va-Vb in the given circuit incorrect?
  • sankalpmittal
  • · Replies 18 ·
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18
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Linear thermal expansion of steel
  • honeybeau
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1
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Finding mass in a pulley system
  • Robertoalva
  • · Replies 12 ·
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12
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How do you convert flash/min to rev/s using stroboscope
  • shin777
  • · Replies 3 ·
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3
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Kinematics motion, projectile. This was an mcat problem. Thanks
  • HumorMe81
  • · Replies 6 ·
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Intuitive understanding of capacitors in series and parallel
  • psilocybin
  • · Replies 3 ·
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AC circuit: is the voltage source absorbing or delivering?
  • mrhingle
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Calculate frank's distance and displacement.
  • STEMucator
  • · Replies 9 ·
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9
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Finding the Rate of Change of a Falling Ladder
  • sherrellbc
  • · Replies 2 ·
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2
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Calculating Time of Death Using Newton's Law of Cooling
  • 2013
  • · Replies 10 ·
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Finding the Rate of Change of a Falling Ladder
  • sherrellbc
  • · Replies 13 ·
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Physics 12 vector (sin law, cos law) problem
  • gdhillon
  • · Replies 4 ·
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4
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Physics 12 momentum and vector question
  • gdhillon
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Calculating Work Done by a Horse Pulling a Wagon with Friction on a Level Road
  • gdhillon
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Quite a few phys 12 questions, on unit 3 dynamics,energy,work,power
  • gdhillon
  • · Replies 3 ·
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Physics 12: Power Output Calculation for Accelerating Object
  • gdhillon
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Physics 12 energy, work question
  • gdhillon
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The resistance in water between two bouys
  • Order
  • · Replies 7 ·
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Physics 12 energy/work question
  • gdhillon
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Physics 12 Momentum and work, energy question
  • gdhillon
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Need help with tricky gravitational force problem
  • PsychonautQQ
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Physics 12 law or conservation of energy
  • gdhillon
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Pulley on inclined plane problem
  • gdhillon
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How Does a Raft Move When Divers Jump Off in Different Directions?
  • gdhillon
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Interesting Newtonian problem involving friction
  • PsychonautQQ
  • · Replies 17 ·
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Extreme Confusion of centripetal acceleration force and normal force
  • SecretSnow
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Determine the amount of americium-241 remaining after 15 years.
  • dannie
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Gravitational Weight into kilograms
  • BadSkittles
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How Long Does It Take for Half the Energy in a Capacitor to Dissipate?
  • PsychonautQQ
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Calculate the average force acting on the block
  • agoogler
  • · Replies 11 ·
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Physical Problem - triangle as a pool table
  • 2013
  • · Replies 11 ·
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Centripetal Force of an amusement park ride
  • kevin17ym
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Conceptual centripetal problem of a spinning ball attached to a string
  • kevin17ym
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Proof that all charge lies at the surface of a conductor
  • Final_HB
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Inelastic Collision Problem: Speed of Earth and People
  • Arcarius
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Finite square well potential energy
  • Jalo
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Walking: Why Is Friction Necessary?
  • andyrk
  • · Replies 25 ·
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Direct collision with a barrier at an angle
  • Woolyabyss
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Airplane diving with a circle radius
  • Robertoalva
  • · Replies 17 ·
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Two things that would minimize environmental impact(fission reaction)
  • dannie
  • · Replies 2 ·
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What is the energy density of the electric field ?
  • pr_angeleyes
  • · Replies 2 ·
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[QM] Help understanding this bra-ket solution
  • JBrandonS
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How Do You Apply Sig Figs in Calculations and Trigonometry?
  • jaydnul
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What is the mass of the sphere?
  • dannie
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Help solve all this question please
  • tauwee
  • · Replies 3 ·
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Distance travelled whilst decelerating
  • gary32
  • · Replies 47 ·
2
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Angular acceleration given force, moment arm and inertia?
  • joema
  • · Replies 3 ·
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Calculating Horse Travel Time from Manila to Baguio
  • Furfox
  • · Replies 5 ·
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Tensions Problem: 2 ropes and 3 blocks
  • JANGurTHANG
  • · Replies 1 ·
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Projectile motion with mass height and range
  • SPiazzo
  • · Replies 2 ·
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What Dynamo to Use? Get Help to Charge Battery 3.5V 1000mA
  • R Power
  • · Replies 7 ·
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Conservation of Angular Momentum of a man
  • andyrk
  • · Replies 18 ·
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Instantaneous Centre of Rotation
  • andyrk
  • · Replies 24 ·
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Computing The Gravitational Force At A Point
  • Bashyboy
  • · Replies 5 ·
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Container with two gases and equation of state
  • gerardpc
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How do you find the density of a liquid with a submerged block?
  • agentlee
  • · Replies 1 ·
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Calculating Retarding Force for a Free Falling Mass
  • gary32
  • · Replies 15 ·
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How much force does it take to send a 200lbs object flying?
  • Zeromaru
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Particle going in a circle with speed U problem
  • hamilbr
  • · Replies 2 ·
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Path dependence - Question of Thermodynamics
  • gerardpc
  • · Replies 1 ·
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Circuit Troubleshooting: Simple Setups to Ask Questions
  • vadevalor
  • · Replies 24 ·
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How are these derived for an inclined plane?
  • catzmeow
  • · Replies 5 ·
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What is the proof that periods cancel out in finding angular displacement?
  • Bashyboy
  • · Replies 8 ·
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Solid pulley & mass on an inclined plane
  • Ampere
  • · Replies 2 ·
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Why is Cpln(T2/T1) Zero for Isothermal Entropy Change?
  • freshbox
  • · Replies 2 ·
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Thermodynamics: find internal energy given the equation of state
  • gerardpc
  • · Replies 5 ·
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What is the Constant of Proportionality in Newton's Second Law of Motion?
  • andyrk
  • · Replies 6 ·
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Finding 3 currents in 3 different branches
  • judas_priest
  • · Replies 11 ·
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11
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Equation Finding Strategies for Solving Physics Problems
  • shin777
  • · Replies 8 ·
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Torque of human arm when bending
  • mdp_somebodeh
  • · Replies 4 ·
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4
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Calculating the Resistance of a Wedge
  • elionix
  • · Replies 4 ·
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Did the Break Shot Break the Pool Record?
  • beginner33
  • · Replies 2 ·
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Trouble with Uniformly Accelerated Motion problem
  • Trickstar
  • · Replies 6 ·
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6
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How can the time taken for a loop to roll down an incline be calculated?
  • Saitama
  • · Replies 10 ·
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Calculate the total resistance of the circuit
  • agoogler
  • · Replies 4 ·
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4
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