Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
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How to calculate time when falling off a building
- 3.141592
- · Replies 7 ·
Application of Circuit laws (KCL and KVL)
- hms.tech
- · Replies 4 ·
Radiant Intensity vs. Irradiance
- JJBladester
- · Replies 2 ·
Motion & Energy: Calculate Total Energy & Friction Coefficient
- jimmy4
- · Replies 6 ·
Thermodynamics involving escape velocity and Boltzmann factor
- bbrain
- · Replies 7 ·
How Do You Calculate Projectile Motion for a Missile Launched at an Angle?
- elgato11
- · Replies 3 ·
Block on a slope, friction related
- Revolt
- · Replies 6 ·
Is Epicyclic an Accurate Term for the Moon's Orbit Around the Sun?
- Minki
- · Replies 3 ·
Experimental calculated values and Uncertainties
- Yoshimine
- · Replies 4 ·
Buoyancy (Archimede's Principle) Problem
- Von Neumann
- · Replies 7 ·
Three connected masses with horizontal force
- PhizKid
- · Replies 1 ·
Quick Projectile Motion Problem
- quicksilver123
- · Replies 3 ·
Is the Conservation of Energy Solution Correct?
- Ammar w
- · Replies 2 ·
Interpreting compass bearing 50° SW vs NE
- personguything
- · Replies 3 ·
Interference and slits question
- doctordiddy
- · Replies 1 ·
Rotational dynamics, semicircular arc
- Saitama
- · Replies 5 ·
What Is the Velocity of a Ladybug on a Moving Chair Relative to the Ground?
- quicksilver123
- · Replies 4 ·
Is it Possible to Turn a Car Without Skidding?
- PhizKid
- · Replies 1 ·
How Is Work and Kinetic Energy Calculated in Physics Problems?
- Junebugg
- · Replies 1 ·
Finding I1/I2 with the current divider rule
- freshbox
- · Replies 8 ·
Tether rotation device in space problem
- nhmllr
- · Replies 3 ·
When does the small angle approximation deviate by more than 1%?
- Airsteve0
- · Replies 1 ·
Kinetic energy to accelerate a proton to 0.9999c
- Lauren12
- · Replies 2 ·
What's the volume of water required inside the lock if
- davekardle
- · Replies 8 ·
Black box with 1 ppm current imbalance: time to reach 1000 V
- rbrayana123
- · Replies 14 ·
Angular momentum; turntable problem
- physicsstdnt
- · Replies 2 ·
What Causes a Pebble to Slip on a Rotating Wheel?
- PhizKid
- · Replies 2 ·
How do you find the number of electrons given a mass fo the object?
- Bwilli
- · Replies 3 ·
Finding Tension in String Connected to Electrically Repelled Sphere
- velouria131
- · Replies 3 ·
What is the shortest wavelength photon emitted in a hydrogen atom?
- Kennedy111
- · Replies 4 ·
What actually happens when slicing occurs
- sgstudent
- · Replies 7 ·
Calculating Energy Levels and Wavelengths in the Hydrogen Atom
- Kennedy111
- · Replies 1 ·
Finding velocity of a vehicle using Doppler Shift for sound
- nawg04
- · Replies 4 ·
Minimum r/R ratio for SHM when a hoop with mass rotates in a semicircular trough
- Saitama
- · Replies 55 ·
Electron's Energy After Absorbing A Photon
- Kennedy111
- · Replies 1 ·
Conversation of energy to determine angular velocity
- deltaOmega
- · Replies 5 ·
Tension in a circular wire with force radiating outwards
- hyperddude
- · Replies 3 ·
Maximum speed of an object after a spring
- liamtcarroll
- · Replies 5 ·
Deriving equation for minimum height in projectile motion with two give me's
- Ceeerson
- · Replies 13 ·
Millikan Oil Drop Experiment Question
- Kennedy111
- · Replies 4 ·
Relationship between length of rubber beam and time to come to rest
- never4getthis
- · Replies 1 ·
Tension of rope between two trees
- PhizKid
- · Replies 2 ·
AP PHYSICS ~ Thermal Properties ~ A heat transfer of
- Silverbolt
- · Replies 1 ·
What is the final temperature of a lead ball dropped from a height of 4.57 m?
- Silverbolt
- · Replies 4 ·
Power dissipated by a resistor in parallel
- anban
- · Replies 6 ·
How Fast is a Particle Moving at 15 Meters in Two Dimensions?
- im4rheal
- · Replies 14 ·
Confusion with Friction and mechanical energy
- DunWorry
- · Replies 13 ·
Why Doesn't the Energy Method Require Friction for Rolling Objects?
- RRachev
- · Replies 6 ·
How Does a Particle's Position Change with Acceleration in the XY Plane?
- im4rheal
- · Replies 1 ·
Adding vectors with the component method
- personguything
- · Replies 2 ·
Constant acceleration problem to find the speed of a rocket
- mahrap
- · Replies 3 ·
Torques in equilibrium w/ angle
- supercherrie
- · Replies 1 ·
Differences between heat capacity and thermal conductivity/convection
- sgstudent
- · Replies 9 ·
Meter used before digital meter?
- kooombaya
- · Replies 15 ·
Solve Rotational Dynamics Homework: Hollow Cylinder, Weight, String
- golanor
- · Replies 10 ·
When is P1V1=P2V2 valid if the amount of gas changes?
- sgstudent
- · Replies 15 ·
Working out EMF and internal resistance
- PhysStudent81
- · Replies 3 ·
Calculating the mass of an object pivoting on a point
- agm1984
- · Replies 7 ·
Point Where Electric Field=0 (3 point charges on x-axis)
- lola748
- · Replies 3 ·
Expression for voltage across resistor in circuit
- leroyjenkens
- · Replies 3 ·
Gradient Vector Problem: Steepness and Slope Direction?
- bmb2009
- · Replies 4 ·
How Do You Calculate the Force of Friction on a Moving Cart?
- kurikat
- · Replies 2 ·
Speed of a Wave: Solve for V in 4.6m and 7.4s
- pmd28
- · Replies 3 ·
Ice Sled Powered by Rocket Engine: Find t1, t2, v & Final Position
- funwithphysics
- · Replies 2 ·
Time for Two Balls to Reach Same Height
- n_nason
- · Replies 5 ·
Simple Harmonic Oscillator Problem
- Hibbs
- · Replies 6 ·
Delta-Y equivalence and third circuit configuration with three terminals
- rbrayana123
- · Replies 29 ·
Zero impact vehicle that needs to travel 9 through 12 m
- Physicsdood99
- · Replies 5 ·
Car sliding down inclined plane.
- leroyjenkens
- · Replies 14 ·
What is the Relationship Between Spring Stretching Distance and Applied Work?
- firezap
- · Replies 5 ·
Distance from +4μC to Zero Potential: 24mm
- mrcotton
- · Replies 2 ·
Wave Interference - the principle of superposition
- Element1674
- · Replies 2 ·
When is electric field zero and electric potential non zero
- mrcotton
- · Replies 1 ·
Arrival time from two US transducers
- enc08
- · Replies 4 ·
Why is my capacitor voltage 8.35V when capacitors are in series?
- freshbox
- · Replies 8 ·
Two boxes sliding down inclined plane
- zeralda21
- · Replies 16 ·
Calculating Velocity and Direction Using the Doppler Effect
- vishnu manoj
- · Replies 1 ·
Car moving with two blocks attached to it.
- ShizukaSm
- · Replies 5 ·
Relative Acceleration in Noninertial Reference Frames
- Bipolarity
- · Replies 2 ·
Rolling Coin, Kleppner and Kolenkow, off by a factor of 3
- AlwaysCurious
- · Replies 8 ·
Using mathmatica, solving single equation
- kougou
- · Replies 2 ·
Working out signs of work and heat for entropy change question
- shakeybear
- · Replies 10 ·
Tangential acceleration of a bicycle pedal
- daffy
- · Replies 1 ·
Electrons in a magnetic/electric field
- gokuls
- · Replies 1 ·
What is the Acceleration of an Inclined Plane due to Recoiling Block?
- WannabeNewton
- · Replies 2 ·
How to calculate initial velocity and launch angle? (Projectiles)
- puppy143158
- · Replies 1 ·
How Does a Sphere Exchange Thermal Radiation in Different Temperatures?
- bmb2009
- · Replies 2 ·
Solving PV Graphs: Work, Heat, ΔU Questions
- skoopfadj
- · Replies 3 ·
A man pulls himself up;What force does he exert on the elevator?
- ShizukaSm
- · Replies 7 ·
Magnetic Field above a Rectangular Circuit
- Contingency
- · Replies 3 ·
Does Slope Affect Car Stopping Distance?
- Kieranlavelle
- · Replies 7 ·
Permutation question with a dial
- zaddyzad
- · Replies 1 ·
How to Determine the Brightness of Bulbs in a New Configuration?
- hms.tech
- · Replies 1 ·
How to Calculate the Torque Needed to Stop a Gear System in 2 Seconds?
- TheAustrian
- · Replies 11 ·
Calculating Time Dilation of a Rocket.
- alex1261
- · Replies 3 ·
Physics Theory Questions. Electrostatic/magnetic
- skg94
- · Replies 6 ·
Calculating Gforce of Impact from 3ft Fall
- Cryptic edge
- · Replies 2 ·
How Do You Apply Series and Parallel Rules in Circuit Analysis?
- Nikola_Tesla
- · Replies 12 ·
Calculating refraction in continuous refractive index
- vmedica
- · Replies 2 ·
Special Relativity of rocket relative to you
- tombarrtt
- · Replies 3 ·