Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
How is Rocket Propulsion Affected by Gravity?
- Lola Luck
- · Replies 5 ·
Time-energy uncertainty and derivative of an operator
- peripatein
- · Replies 5 ·
Cross section and collision rates in particle beam attenuation
- Coffee_
- · Replies 3 ·
Mass of Pion in Gev/c^2: Calculate and Convert
- Abby D
- · Replies 1 ·
Where is North, given this current?
- AAAA
- · Replies 12 ·
Electromagnetic emission lines for a hydrogen atom
- Jdraper
- · Replies 4 ·
Constant horizontal force and friction
- rasen58
- · Replies 4 ·
Does the Golf Ball Land Before, In, or After the Lake?
- rasen58
- · Replies 3 ·
Atwood's machine with angular momentum
- hitemup
- · Replies 4 ·
Why does current i_1 depend only on capacitor C in a two-capacitor LC circuit?
- arpon
- · Replies 3 ·
Normal Reaction in the following cases
- Kasul
- · Replies 6 ·
Tension in a vertical twisted string with mass
- jonny23
- · Replies 4 ·
Calculate acceleration due to gravity
- rasen58
- · Replies 4 ·
What is the solution to the straw paradox?
- Ansuman
- · Replies 9 ·
Kirchhoff's Loop Rule Problem.
- Prashasti
- · Replies 10 ·
Why Does the Bar Exert More Force Than the Gymnast's Weight?
- urbano
- · Replies 1 ·
What Happens to a Partially Inserted Dielectric in a Capacitor?
- Patrikp
- · Replies 1 ·
Changing pitch in frequency ratio?
- Mickey Tee
- · Replies 6 ·
Coefficient of kinetic friction between a car and the road
- discosucks
- · Replies 12 ·
Air is compressed in a cylinder
- Karol
- · Replies 5 ·
Laws of Motion topic -- Car being decelerated by a headwind
- Barclay
- · Replies 5 ·
How Does Changing the Wheel's Axis Affect Platform Rotation?
- hitemup
- · Replies 1 ·
Neutral Point between point charges
- Samurai44
- · Replies 12 ·
Change in voltage due to additional source
- Queequeg
- · Replies 3 ·
Pressure increase when force is applied to all four pistons of a water-filled container
- jonny23
- · Replies 8 ·
What is the effect of air resistance on a parachutist's acceleration?
- lila adel omar
- · Replies 18 ·
How Does Adding Weight to a Forklift's Forks Affect the Load on the Rear Axle?
- longnh
- · Replies 12 ·
Using Compressed Air Tools Outdoors: Can it be Done?
- stephenranger
- · Replies 1 ·
What is the acceleration of a falling coin?
- Barclay
- · Replies 8 ·
Finding velocities of asteroids after an inelastic collision
- Timothy S
- · Replies 5 ·
Question of Force - why it differs in reality?
- PhysicStud01
- · Replies 10 ·
Velocity of end points of the rod
- Satvik Pandey
- · Replies 33 ·
''Invariant mass of the electron and electron antineutrino''
- Coffee_
- · Replies 5 ·
Does the formula W = pc apply to work on massive particles like electrons?
- Alettix
- · Replies 6 ·
Ray transfer matrix - Plano convex lens
- AwesomeTrains
- · Replies 9 ·
How to describe motion of the wall of a liquid container?
- sceptic
- · Replies 6 ·
Energy and momentum in a car accident
- Jakob Weg
- · Replies 4 ·
Why Does Rearranging an Inductor Yield Different Magnetic Fields?
- matej1408
- · Replies 3 ·
Why multiply by speed instead of area in magnetic flux calculation
- Samurai44
- · Replies 5 ·
Calculating Mean Free Path of N2 Molecule in UHV Chamber
- albega
- · Replies 2 ·
FRW dust universe: deriving energy-momentum conservation equation
- binbagsss
- · Replies 1 ·
Calculating Mass Increase of Coffee Using Specific Heat Capacity
- Smartgurl
- · Replies 9 ·
Labeling + or - on random point on circuit- What does it mea
- LongApple
- · Replies 6 ·
Does a Silvered Plano-Convex Lens Act Like a Concave Mirror?
- sarthak sharma
- · Replies 5 ·
Motor Principle and Magnet on Balance
- mixedbag4444
- · Replies 2 ·
How High Can a Garbage Can Be Lifted by a Geyser?
- geoffrey159
- · Replies 13 ·
Nuclear / Particle Phys Notation quick q spin, parity,J
- binbagsss
- · Replies 1 ·
How Does a Pendulum Bob's Speed Relate to Its Displacement Angle?
- ubergewehr273
- · Replies 10 ·
A wheel with rotational inertia I = 1/2MR^2
- hitemup
- · Replies 6 ·
Find a for infinite distance travel with drag force F=kv^a
- Patrikp
- · Replies 10 ·
Redrawing circuit with series/parallel combinations to match solution
- LongApple
- · Replies 9 ·
Given Force is 4xDisplacement, find work done
- Govind_Balaji
- · Replies 10 ·
A rotational tire and tape problem.
- Lazar Trif
- · Replies 8 ·
Wind turbine powering alternator of car instead of engine?
- quietfury
- · Replies 13 ·
Why Does the Laplacian of 1/Vector r Equal Zero?
- NewtonApple
- · Replies 3 ·
How to calculate wind turbine output?
- quietfury
- · Replies 16 ·
How Can I Trigger a Ball While the Car is Moving for My Physics Experiment?
- nese
- · Replies 2 ·
Tensions of cable over a pulley
- arpon
- · Replies 6 ·
Finding initial velocity when jogger accelerates then decelerates over 11m
- Ksenia
- · Replies 6 ·
The 1100 kg mass of a car includes four tires
- hitemup
- · Replies 6 ·
Determine the speed of the rock as it leaves the spring.
- HumanPerson
- · Replies 9 ·
Question based on using vectors
- katuan
- · Replies 6 ·
Why is nσvdt a probability for molecular collisions?
- fayled
- · Replies 33 ·
Impulse and average force in a baseball collision
- julianwitkowski
- · Replies 5 ·
Induced electric field due to a moving wire
- ELB27
- · Replies 3 ·
How much oxygen escaped from the container?
- Karol
- · Replies 4 ·
Find the Tension and Acceleration of Cable B in Picture 3
- arpon
- · Replies 4 ·
Electric current function of time
- Karol
- · Replies 3 ·
The voltage and an electric heater
- Karol
- · Replies 4 ·
Latent Heat Solid->gas Liquid->gas transitions
- thonwer
- · Replies 2 ·
Angular momentum of non-coaxial rotating disks
- basheer uddin
- · Replies 4 ·
Energy, momentum and centre of mass
- erisedk
- · Replies 19 ·
Resistance grows with temperature
- Karol
- · Replies 4 ·
Sign of Frictional Torque in Pulley Equation
- hitemup
- · Replies 5 ·
Matrix representation of an operator in a new basis
- peripatein
- · Replies 8 ·
Modulation of waves (Communication Systems)
- Prashasti
- · Replies 6 ·
Find Tension of Rope in Two Blocks System: 5kg, 7kg, 4kg, 200N
- legendknight
- · Replies 3 ·
What Factors Affect the Speed of a Skydiver One Second After Jumping?
- Barclay
- · Replies 11 ·
Dependence of resistance on temperature
- Karol
- · Replies 2 ·
Calculating Heat Capacity of Calorimeter
- Armitage12
- · Replies 12 ·
Oxygen and mercury in a tube problem
- Rugile
- · Replies 6 ·
Amplitude Modulation of a wave
- Prashasti
- · Replies 3 ·
How Does a Rope Fall Through a Hole in Physics?
- geoffrey159
- · Replies 4 ·
What Is the Fastest Way to Cross a Flowing River by Boat?
- rasen58
- · Replies 5 ·
Find resistance of resistor in RC circuit
- AndrejN96
- · Replies 4 ·
What Is the Stopping Distance for Cars A and B?
- Barclay
- · Replies 9 ·
Does a static container apply a torque on Earth ?
- Cri85
- · Replies 2 ·
How Does a Gravitational Slingshot Affect Spacecraft Velocity?
- MMS
- · Replies 22 ·
Why does constant curvature force Riemann tensor to depend only on the metric?
- binbagsss
- · Replies 8 ·
Why apply weight force at center of mass for a fluid instead of at the bottom
- Cri85
- · Replies 15 ·
Calculating Velocity on an Incline Slide
- keithcuda
- · Replies 21 ·
Why Do Planets and Stars Revolve Around Their Center of Mass?
- erisedk
- · Replies 11 ·
Finding Effective Resistance using Kirchhoff's Rule
- Hijaz Aslam
- · Replies 12 ·
Notation for marking the voltage drop in this picture
- LongApple
- · Replies 5 ·
Is the Bar of Gold Real? Using Buoyancy to Determine Density
- BrainMan
- · Replies 15 ·
Maximum Angle for Non-Null Initial Velocity of Billiard Ball Hit by Cue
- anon90
- · Replies 38 ·
Accelerating projectile force needed
- cheekibreeki
- · Replies 2 ·
Water discharging vertically from a pipe at 5 m/s
- EmmaWillow
- · Replies 2 ·
Horizontal velocity over an uneven surface
- rasen58
- · Replies 2 ·
Why does the thinner wire experience 4 times the stress, not 8 times?
- BrainMan
- · Replies 2 ·