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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Potential difference in a coaxial cable with line charge density
- brad sue
- · Replies 2 ·
Calculate the number of excess electrons
- Mitchtwitchita
- · Replies 4 ·
Conical pendulum inclination angle comes out greater than 1
- haddow64
- · Replies 12 ·
What is the average angular speed of the grindstone?
- brncsfns5621
- · Replies 6 ·
Potential difference of a capacitor
- kbyws37
- · Replies 6 ·
Dielectrical constant / relative permittivity
- nikkebargell
- · Replies 2 ·
Boat slowing from 90 km/h to 45 km/h with speed-dependent friction
- Saladsamurai
- · Replies 21 ·
Why Do Two Different Inclined Planes Yield the Same Final Speed for a Mass?
- chaoseverlasting
- · Replies 3 ·
Time problem, I am having too much trouble trying to solve ?
- bmack
- · Replies 3 ·
Solving Momentum and Velocity Questions for an Air Track Glider
- roguekhost
- · Replies 1 ·
Rubber ball dropped 2.0 m bouncing off floor
- roguekhost
- · Replies 1 ·
Who First Described Wave Propagation Through Medium Disturbance?
- Haibane
- · Replies 3 ·
Proving the zeros of sinh(z) and cosh(z)
- laura_a
- · Replies 1 ·
What does sin(z with a hat) mean?
- laura_a
- · Replies 1 ·
Finding Tension and Mass in a Rotational Motion Problem
- xaer04
- · Replies 10 ·
How to derive the formula for tan(-1)(z) ~ Complex variables
- laura_a
- · Replies 2 ·
Bullet passing through a block connected to a spring
- Gammage
- · Replies 2 ·
Cat walking on supported plank at what distance does tipping occur
- edr2004
- · Replies 6 ·
Minimum angular velocity formula
- edr2004
- · Replies 1 ·
Springs, Masses, and Friction oh mY
- bpw91284
- · Replies 2 ·
Calculating Mass of Hanging Block on Inclined Plane
- stumper
- · Replies 6 ·
Electric potential midway between 2 charges
- kbyws37
- · Replies 1 ·
Boat deceleration with velocity-dependent friction
- Saladsamurai
- · Replies 1 ·
A mass-spring system with recoil and friction
- Trojanof01
- · Replies 2 ·
Simple 4th grade question I presume
- ph123
- · Replies 2 ·
Crazy dude jumping on a Merry-Go-Round
- PhyzicsOfHockey
- · Replies 12 ·
How Do You Calculate the Moment of Inertia of a Ceiling Fan?
- hhq5000
- · Replies 2 ·
Find Moment of Inertia and Frictional Torque
- personguy
- · Replies 10 ·
Zero Point of field between two charges
- duelle
- · Replies 3 ·
Charge on parallel plates and field inside a uniform sphere
- suspenc3
- · Replies 1 ·
SHM: when does a particle at 4.0cm amplitude, 50Hz reach y = 3.0cm?
- imy786
- · Replies 28 ·
Conservation of Energy bullet of mass
- chaoseverlasting
- · Replies 5 ·
Potential Energy of a Charged Particle in a Uniform Electric Field
- brunie
- · Replies 4 ·
How can I back up my answers for a physics experiment?
- lord_blurg
- · Replies 3 ·
What frequency of vibration is required?
- imy786
- · Replies 39 ·
Predicting the Trajectory of a Thrown Ball on a Moving Train
- shehri
- · Replies 12 ·
Lightbulb connected to the battery circuit helo
- pinkpolkadots
- · Replies 16 ·
What Happens if Earth Stops Revolving and Gravitational Forces Vanish?
- shehri
- · Replies 1 ·
Newton's Variation of Kepler's third law
- Jess048
- · Replies 1 ·
Assumption true on specific heat capacity?
- greenfloss
- · Replies 6 ·
Calculating the Modulus of Elasticity from a Stress-Strain Curve
- kasse
- · Replies 2 ·
Kinematics question on a motorcycle
- imy786
- · Replies 61 ·
Why is using visible light for radio transmission not feasible?
- bsmith
- · Replies 1 ·
Static equilibrium and torque calculation
- Rasine
- · Replies 6 ·
How Is Pressure Calculated Underwater?
- iamtrojan3
- · Replies 1 ·
How Big Must the Mirror Be to Focus a Megawatt per Square Meter on a Monkey?
- stringa
- · Replies 8 ·
Catching a cockroach with relative motion and acceleration
- nyguy
- · Replies 1 ·
Finding the max height of a ball launched as a projectile using work-energy
- ph123
- · Replies 3 ·
What is the spring constant if a 0.25 kg rock stretches a spring by 0.25 m?
- iamtrojan3
- · Replies 3 ·
Determine the distance that the spring is compressed
- waterfaire
- · Replies 6 ·
Why Does a Metal Ring Heat Up in a Changing Magnetic Field?
- a1densmom
- · Replies 7 ·
How Do You Express Kinetic Energy in Terms of Momentum?
- harvoh126
- · Replies 2 ·
Calculating Phase Shift for a Series RC Circuit
- map7s
- · Replies 3 ·
Does effective gravity change pendulum frequency?
- bpw91284
- · Replies 5 ·
Calculating Work and Force in a Perfectly Inelastic Collision
- rubyred401
- · Replies 4 ·
Calculating Required Surface Charge Density for a Cylinder
- suspenc3
- · Replies 8 ·
Number of windings for 120-V household circuit?
- a1densmom
- · Replies 3 ·
Calculating Magnetic Force and Acceleration of a Proton
- brunie
- · Replies 16 ·
Shooting a block up an incline - work energy
- ph123
- · Replies 3 ·
Calculate Time to Reach Equilibrium After Spring Stretching
- bpw91284
- · Replies 13 ·
Beats from different temperatures and destructive interference frequencies
- Gauss177
- · Replies 3 ·
Find the tension in the two wires
- kp87
- · Replies 4 ·
How Do You Calculate Vertical Forces on Beam Supports with a Piano?
- kp87
- · Replies 1 ·
Energy to raise temperature of water
- Dazed
- · Replies 4 ·
Homopolar Generator - V, IR & Deceleration
- georgia
- · Replies 3 ·
Electric field inside a charged dielectric
- ijustlost
- · Replies 2 ·
Calculating Current Induced in a Moving Loop
- dtesselstrom
- · Replies 2 ·
Is My Transistor DC Circuit Analysis Correct?
- mrjeffy321
- · Replies 7 ·
Does a wave's energy come from a single particle or the whole medium?
- e(ho0n3
- · Replies 4 ·
Collision Problem Help: Find Final Speed and Energy Loss | 300g & 700g Spheres
- adam112
- · Replies 1 ·
How Do You Calculate the Power of a Car's Engine on an Incline?
- adam112
- · Replies 1 ·
Special Relativity at HighSchool, theories against.
- paradoxical67
- · Replies 17 ·
Frequency of Generator + V of Capacitor
- kmj9k
- · Replies 2 ·
Wheres a good site to look up electric flux?
- jst81161
- · Replies 1 ·
Ferromagnetic dipole in a uniform magnetic field
- aquabum619
- · Replies 10 ·
Conservation of momemntum and relative velocities
- FaNgS
- · Replies 2 ·
How Do Two Lenses Affect the Focus of Light from Infinity?
- SoaringQuail
- · Replies 1 ·
Tension of two wires at 40 and 45 degrees
- unique_pavadrin
- · Replies 8 ·
I want to make a non-working model
- varunsarda88
- · Replies 12 ·
Solve Roatational Motion of Cylinder on Block Edge
- prabhat rao
- · Replies 1 ·
Circumference of the earth via latitute mesurement
- blumfeld0
- · Replies 5 ·
How Do You Calculate the Speed of Water Waves?
- rubbertoe
- · Replies 2 ·
How Does Distance Affect Perceived Loudness and Intensity in Tuning Forks?
- Smartie404
- · Replies 1 ·
Just wondering about electrons.
- Dazed
- · Replies 3 ·
How Does Reducing Balance Wheel Dimensions Affect Angular SHM Frequency?
- morbidpotato
- · Replies 3 ·
Calculating Average Force on a Bouncing Steel Ball
- Gammage
- · Replies 3 ·
Direction of current in resistor using Lenz's and Faraday's law
- cy19861126
- · Replies 2 ·
What is the moment of rotational inertia about the axis indicated?
- vertex78
- · Replies 6 ·
Which Temperature Range Cools Faster According to Newton's Law of Cooling?
- sunbunny
- · Replies 7 ·
Work to move a test charge near a charged sphere
- quickslant
- · Replies 4 ·
Force constant of a spring launching a satellite
- ph123
- · Replies 4 ·
Not sure where to start what formula to use
- csquared
- · Replies 1 ·
Pendulum period integral without small angle approximation
- Ja4Coltrane
- · Replies 9 ·
Collision with Spring: Solving for Distance and Final Velocities
- kle89
- · Replies 2 ·
Velocity of projectile launcher
- Elliian
- · Replies 5 ·
Proving Charge Distribution Inside a Sphere Cavity
- gandharva_23
- · Replies 7 ·
How Do You Calculate Voltage, Power, and Current in a Combination Circuit?
- jenita
- · Replies 6 ·
Dc Circuits - Voltmeter/ammeter
- abm4life
- · Replies 8 ·
Why does current stay the same through different pipe sections?
- asdf916
- · Replies 1 ·
Calculating Orbital Radius of Ganymede using Orbital Period
- trekkie1701c
- · Replies 3 ·