Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
What Should Manufacturers Specify: Peak Power or Average Power in Audio Systems?
- Physicslearner500039
- · Replies 1 ·
Ionization Energy: Solving for n and Why I Was Wrong
- jjson775
- · Replies 9 ·
Clarification about Mutual Inductance
- Physicslearner500039
- · Replies 5 ·
Find the altitude and the speed of two jets with Doppler Effect
- Edel Crine
- · Replies 1 ·
Electric Field of a Finite Cylinder
- wxguy28
- · Replies 3 ·
Kinematics question: Stunt driver jumping his car from ramp to ramp
- nicky670
- · Replies 8 ·
Tension and reaction force in circular motion
- Like Tony Stark
- · Replies 2 ·
A mistake in the derivation of escape velocity
- Leo Liu
- · Replies 5 ·
How Does the Order of People Jumping Affect the Final Velocity of a Flatcar?
- Leo Liu
- · Replies 9 ·
Finding the center of mass of a solid hemisphere
- Hamiltonian
- · Replies 19 ·
Two rods, each with a free and a fixed ball and a spring
- Like Tony Stark
- · Replies 9 ·
Why Is My Calculation Result for Acceleration Incorrect?
- nicky670
- · Replies 10 ·
How Do You Calculate the Buoyant Force for a Stratospheric Balloon?
- nicky670
- · Replies 9 ·
Why will acceleration be -9.8 if it is moving upward direction?
- nicky670
- · Replies 7 ·
Kinematics, Conservation of energy, momentum
- wcjy
- · Replies 9 ·
A pyramid of three cylinders (statics problem)
- lloydthebartender
- · Replies 15 ·
Calculating the Force Required for a Moving Wedge and Block System
- tryingtolearn1
- · Replies 5 ·
Calculating Time Difference and Length Contraction in Train Overtaking Scenario
- Amrator
- · Replies 11 ·
Solving Special Relativity Problem with Train Walking
- Amrator
- · Replies 14 ·
Mechanics: Explosion of an Object Vector Diagram
- AN630078
- · Replies 38 ·
Density of Water at 1°C & 8°C | Homework Help
- nicky670
- · Replies 8 ·
Momentum and Conservation of energy
- wcjy
- · Replies 2 ·
Integration ##\ddot\phi = -\omega^2\phi##
- happyparticle
- · Replies 4 ·
What is the formula for calculating electrical potential?
- jjson775
- · Replies 6 ·
Help with these rocket launch questions please
- takelight2
- · Replies 11 ·
Is the Calculation of Linear Density k for a Uniformly Charged Bar Correct?
- ToucanFodder
- · Replies 3 ·
Voltage using different references
- darioslc
- · Replies 4 ·
Hollow and solid spheres floating in liquid
- brotherbobby
- · Replies 16 ·
Calculating Time with Forces Acting on a Block
- tryingtolearn1
- · Replies 5 ·
Trouble Understanding Phasor to Time Domain Conversion Math
- Mark Zhu
- · Replies 2 ·
Mechanics: Motion of Two Connected Vehicles
- AN630078
- · Replies 3 ·
Specific work done by an adiabatic & reversible compressor on air
- Master1022
- · Replies 6 ·
How to draw the transfer behavior of a fuzzy controller
- Elias_HH
- · Replies 6 ·
Which symbol is more relevant for refractive index: μ or n?
- anyonebutangel
- · Replies 6 ·
Calculator Question (Casio) -- How to disable "Shift 9 = AC"
- chriscarson
- · Replies 11 ·
Finding net charge on a sphere's surface
- archaic
- · Replies 4 ·
Jumping on a Train: Tips and Advice
- john007
- · Replies 35 ·
Force on a charge at the tip of a hollow, charged cone
- cwill53
- · Replies 5 ·
Conservation of Energy Along an Incline with Friction
- ag3
- · Replies 3 ·
Proving that the total mechanical energy is conserved with time
- Hamiltonian
- · Replies 2 ·
Zero Force from 3 charges placed at the vertices of a Triangle
- cwill53
- · Replies 43 ·
Standing waves on a string -- Find the difference of phases
- LCSphysicist
- · Replies 5 ·
Change the wavelength in a driven rope?
- Edel Crine
- · Replies 7 ·
Energy Conservation between mechanical and electrical
- Physicslearner500039
- · Replies 7 ·
How Is the Electric Field Difference Across a Charged Surface Determined?
- madafo3435
- · Replies 2 ·
Uncertainty in the measurement of the focal length in this experiment
- songoku
- · Replies 13 ·
Using Gauss' Law to find the field at a point
- rtareen
- · Replies 6 ·
Significant Figures with Experimental Values
- i_love_science
- · Replies 5 ·
Is Reflection of an Incident Wave Lagging or Advancing?
- LCSphysicist
- · Replies 1 ·
Mechanics: Elevator Accelerating Downward
- AN630078
- · Replies 10 ·
Elastic Collision of Hydrogen and Carbon Atoms
- AN630078
- · Replies 9 ·
Why Does a Moving Rod Appear Inclined in Different Reference Frames?
- Data Base Erased
- · Replies 2 ·
How do you calculate the acceleration of a block sliding down a plane?
- tryingtolearn1
- · Replies 14 ·
Circular Motion of a Cyclist and a Car going around a bend in the road
- AN630078
- · Replies 6 ·
Deriving Cross Vectors: Understanding d/dt[a * (v x r)] = a (v x r)
- happyparticle
- · Replies 16 ·
Find the potential using a line integral (Electromagnetism)
- Vitani1
- · Replies 1 ·
Write the equations of a mass and spring in different accelerated systems
- Like Tony Stark
- · Replies 20 ·
Finding the potential difference of a diode
- Ben1238
- · Replies 6 ·
Difference between curvilinear and rotational motion
- Like Tony Stark
- · Replies 9 ·
Final Image position for a setup with two lenses
- nish95
- · Replies 26 ·
Question about gravitational potential energy and angular motion
- plomeiko
- · Replies 4 ·
Real and Complex representations of an oscillation equation
- e_mts
- · Replies 15 ·
Calculating the distance between fringes in an alternate universe
- Vitani1
- · Replies 3 ·
Work done by a conservative force using change in potential energy
- Hamiltonian
- · Replies 5 ·
What is the Relationship Between Velocity, Radius, and Force in a Pulley System?
- AN630078
- · Replies 4 ·
Duct Pressure Question: Troubleshooting Complicated Units and Conversions
- cwill53
- · Replies 5 ·
Can someone help me interpret this spacetime diagram?
- Vitani1
- · Replies 8 ·
Finding angular Momentum from a force
- fer Mnaj
- · Replies 6 ·
Formula for maximum interference for reflected light (thin - film)
- songoku
- · Replies 3 ·
How can I solve this physics problem step by step?
- Frouel
- · Replies 2 ·
Bicycle wheel forced to roll around a vertical axle
- Nexus99
- · Replies 20 ·
A traveling wave on an infinite string, find the intensity
- LCSphysicist
- · Replies 5 ·
The leaning ladder problem using Newtonian mechanics
- Hamiltonian
- · Replies 27 ·
Why Doesn't My Method Work for Calculating Angular Speed of a Falling Rod?
- dyn
- · Replies 18 ·
Equivalent resistance of a section of a graphite ring
- A13235378
- · Replies 13 ·
How to Determine Reaction Forces on a Gyroscope at Points A and O?
- Like Tony Stark
- · Replies 5 ·
Calculating Wave Amplitude and Frequency
- Edel Crine
- · Replies 25 ·
Question about the Lorentz transform
- billllib
- · Replies 4 ·
A rotating rod acted upon by a perpendicular force
- Hamiltonian
- · Replies 10 ·
How come 7,271,000 mm^3 is equivalent to 7,271 cm^3 ?
- chriscarson
- · Replies 23 ·
Electromagnetism: Force between two charged plates
- oondi
- · Replies 1 ·
RLC Parallel Circuit: Analyzing Current & Voltage at t=0-
- jisbon
- · Replies 10 ·
Solving a Pendulum Problem with Exponential Solution
- archaic
- · Replies 23 ·
Three charges attached to the vertices of a triangle
- LCSphysicist
- · Replies 4 ·
Calculating Earth's Effective Spring Constant for its Orbit Around the Sun
- Edel Crine
- · Replies 8 ·
Second order differential equation solution
- Ron Burgundypants
- · Replies 6 ·
Lagrange Multipliers and Energy Loss Question
- cwill53
- · Replies 19 ·
Two block problems with friction
- Hamiltonian
- · Replies 6 ·
Relationship between Cp, Cv and R
- PSN03
- · Replies 7 ·
Question about the nonlinear Hooke's law
- patric44
- · Replies 28 ·
What Experiments Can I Conduct to Investigate Light Sensitive Devices?
- Taksehasam
- · Replies 5 ·
What causes an object to rotate?
- Like Tony Stark
- · Replies 5 ·
What is the mistake in calculating the magnetic field in this problem?
- Physicslearner500039
- · Replies 3 ·
What happens when an uncharged object is brought into an electric field?
- aspodkfpo
- · Replies 4 ·
Can Angles Be Assigned Dimension in Scientific Calculations?
- HappyFeynman
- · Replies 2 ·
Equation Alternatives for Young's Modulus
- LCSphysicist
- · Replies 14 ·
A simple pendulum is suspended from the ceiling of an accelerating car
- badluckmath
- · Replies 9 ·
The velocity of the center of the base of a rolling cone
- guv
- · Replies 14 ·
Change in acceleration with change of angle of applied force
- GreenOlive
- · Replies 4 ·
2 masses and 2 pulleys (Kleppner and Kolenkow)
- AspiringPhysicist12
- · Replies 2 ·