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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Mass, Volume, Density work with a Sphere
- jdsconsumer
- · Replies 11 ·
Rotational kinematic need explanation
- newbphysic
- · Replies 7 ·
Beta - and Beta + Decay (Q-Value)
- says
- · Replies 11 ·
Calculating Net Work: A Box Being Pushed Across a Floor
- subopolois
- · Replies 1 ·
What exactly is periodic motion?
- SkyrimKhajiit
- · Replies 9 ·
Calculate Time for Stone to Hit Bottom of 180m Well at 20C
- samisoccer9
- · Replies 9 ·
Kirchoff's Law - Wire in parallel with light bulb
- flannabhra
- · Replies 4 ·
How Does Tangential Velocity Relate to Vector Products in Rotational Motion?
- nodtomc
- · Replies 6 ·
Calculating Initial Decay Rate of Ga-67 Isotope
- says
- · Replies 5 ·
WTA : does atomic mass matter to atom's radius?
- adi adi
- · Replies 3 ·
Solving the Frequency of Sound Waves at 20°C
- samisoccer9
- · Replies 6 ·
Calculating Recoil Velocity of a Cannon
- TT0
- · Replies 2 ·
Total resistance in the circuit
- kaspis245
- · Replies 24 ·
Changes in electrostatic potential energy of a moving object
- TalliThePrune
- · Replies 4 ·
Estimate the Dielectric Breakdown of Air
- flannabhra
- · Replies 1 ·
Minimum velocity for particle to lose contact
- Tanya Sharma
- · Replies 16 ·
Waves -- Find the lowest possible values for m_r and m_v
- abm77
- · Replies 8 ·
Relationship Between Velocities of Two Runners
- Drakkith
- · Replies 2 ·
What Is the Q-Value of Pu-239 Fission into Sr-92, He-4, and Neutrons?
- says
- · Replies 27 ·
How do I find rotational energy for a pulley system?
- Preptopro
- · Replies 6 ·
Energy transfer question (Use PE=KE or SUVAT ?)
- CannonSLX
- · Replies 4 ·
How far did the parachutist fall before hitting the water?
- samisoccer9
- · Replies 5 ·
Finding the Density of a given object
- iJpawn
- · Replies 4 ·
Tubular space ship rotates and falls
- Karol
- · Replies 18 ·
How far does a muon travel at 0.99c before decaying?
- student07
- · Replies 2 ·
Finding where velocity and acceleration are greatest from a v-t graph
- Ayesha Shafique
- · Replies 15 ·
Why do different masses slip at the same angular velocity?
- Geo louv
- · Replies 11 ·
Minimum v0 for Tension in Inelastic Collision
- Jeremymu1195
- · Replies 1 ·
Square wire loop moving in a static B field.
- Robsta
- · Replies 2 ·
How Does Special Relativity Affect Pion Decay Measurements?
- BOAS
- · Replies 1 ·
Displacement of a point on a progressive wave
- jack edison
- · Replies 1 ·
Cyclist traveling at 9 km/h for 30 seconds distance
- Ayesha Shafique
- · Replies 5 ·
Why Can't We Rewrite Newton's Second Law as f = m*s/t^2?
- Abhijith S. Raj
- · Replies 7 ·
Position at Which 2 Cars Pass Each Other
- Drakkith
- · Replies 3 ·
Solid State Physics: Atomic chain oscillations
- skrat
- · Replies 2 ·
Finding room temperature from speed of sound in open-closed tube
- SelenaT
- · Replies 3 ·
Why probability doesn't oscillate in quantum harmonic oscillator superposition
- Robsta
- · Replies 1 ·
Can Somebody check my center of mass answer?
- toesockshoe
- · Replies 2 ·
Circular Aperture Diffraction, Angle of First Minimum
- CoffeeCrow
- · Replies 3 ·
Raindrop with constant mass accretion falling under gravity
- GregoryGr
- · Replies 14 ·
What is the Sign Convention for Moments in Free Body Diagrams?
- theone
- · Replies 4 ·
Find the position of the centroid of the shaded area
- david98999
- · Replies 17 ·
At what velocity does the skateboard shoot off?
- cody7688
- · Replies 2 ·
What is the velocity of mass 2m after the collision?
- Xenon
- · Replies 17 ·
How Do You Calculate Average Charge Density in a Cylinder?
- Roodles01
- · Replies 5 ·
Elastic collision: 3 kg at 4 m/s hits stationary 2 kg body
- toesockshoe
- · Replies 8 ·
Can somebody check my answer for momentum
- toesockshoe
- · Replies 30 ·
Moment of force from an axis - 3D problem
- masterchiefo
- · Replies 23 ·
Centre of mass of a solid hemisphere. What am I doing wrong?
- Marvin94
- · Replies 9 ·
Finding Induced EMF of secondary coil
- Toto
- · Replies 1 ·
Special Relativity problem regarding relat. energy/ momentum
- erwinxa
- · Replies 5 ·
Dog walking on raft: why is the boat displacement unknown?
- toesockshoe
- · Replies 26 ·
FInding distance from top of diving bell to lake surface
- Moose100
- · Replies 34 ·
Magnetic field intensity inside a solenoid with copper wire
- geolohs
- · Replies 10 ·
Calculating Gravity from Inclined plane
- Fat_Squirrel
- · Replies 34 ·
Calculate gravitational field strength above surface of Mars
- TalliThePrune
- · Replies 6 ·
How far will a box slide with given initial velocity, friction, and mass?
- subopolois
- · Replies 7 ·
How do I tell what harmonic an instrument is producing?
- Danya314
- · Replies 1 ·
Designing a Vertical Lifting and Holding System for Farm Use
- tmaker1965
- · Replies 10 ·
Difference between a coil and solenoid magnetic field equations
- henry3369
- · Replies 3 ·
Calculate Refraction Angle of Light Falling to Aquarium Water
- geolohs
- · Replies 9 ·
Calculating Speed of Asteroid at its Perihelion
- FaraDazed
- · Replies 8 ·
Atoms emitted from a tube (Atomic Oven)
- Sachin Vaidya
- · Replies 1 ·
Find Value of I in Ohm's Law Circuit
- 22990atinesh
- · Replies 1 ·
Finding object density from normal and apparent weight in water
- brake4country
- · Replies 7 ·
Understanding Kinetic Energy and Momentum in Elastic Collisions
- davon806
- · Replies 10 ·
Acceleration of particle along the curve
- Tanya Sharma
- · Replies 19 ·
Calculating Work Done per Unit Charge in an Electric Field
- brake4country
- · Replies 9 ·
City requires about 15 MW of power problem
- skepticwulf
- · Replies 14 ·
Rotational equilibrium equation - Moment of Forces (2D prob)
- masterchiefo
- · Replies 16 ·
How to make physics problem obey momentum conservation?
- toesockshoe
- · Replies 2 ·
Comet on a parabolic orbit around the Sun
- math 2015
- · Replies 5 ·
Capacitance, unbalanced wheatstone.
- Suraj M
- · Replies 3 ·
Impulse and Momentum Conservation for a Frictionless Cart
- Nelson2436
- · Replies 5 ·
10 m dive. Time and horizontal displacement is known.
- andorini
- · Replies 1 ·
For free fall problems what exactly does time (t) represent?
- physlexic
- · Replies 7 ·
Why is reflected sound quieter than reflected light from a mirror?
- BOYLANATOR
- · Replies 12 ·
What is the Voltage of Bulb D in the Circuit?
- Max T
- · Replies 2 ·
Physics of Bungee Jumping problem?
- jackson8383
- · Replies 16 ·
Magnetic Field of a rotating Cylinder
- Aavatar
- · Replies 1 ·
Three SAT physics problems on friction and inclined planes
- StrugglingMama
- · Replies 2 ·
Range of stone from sling at 30 degrees
- Lamont
- · Replies 2 ·
How Does Friction and Centripetal Force Affect a Person Inside a Rotating Rotor?
- 0kelvin
- · Replies 3 ·
How Does the Monkey's Movement Affect the Box in a Pulley System?
- kaspis245
- · Replies 30 ·
How many balloons can be filled from a hydrogen cylinder?
- Jamessamuel
- · Replies 25 ·
3D Physics problem(Forces and Tension)
- masterchiefo
- · Replies 27 ·
Voltage equation for separately excited DC motor armature circuit
- theone
- · Replies 2 ·
How to Calculate Induced EMF in a Wire Loop Near a Solenoid
- whatisreality
- · Replies 10 ·
Collision involving blocks and pulley
- Tanya Sharma
- · Replies 73 ·
What is the minimum range of angles?
- mss90
- · Replies 2 ·
Electric Field of a Uniformly Charged Cylindrical Surface
- erisedk
- · Replies 2 ·
DC Motor: Solving for Load Speed w/ Torque Relation
- theone
- · Replies 1 ·
Is the worksheet image too difficult to read?
- Judoliam
- · Replies 1 ·
Will house burn down enclosing camera in foam ball?
- Paul Uszak
- · Replies 8 ·
Calculate the net force on the object
- subopolois
- · Replies 1 ·
Calculating Relativistic Momentum for Physics Students
- Cell_52797
- · Replies 3 ·
Relationship Between Bicycle Tire Pressure and Speed
- doctorwho55
- · Replies 3 ·
Very basic question on particle dynamics
- TomW17
- · Replies 4 ·
Projectile motion with linear air resistance and characteristic time
- ma18
- · Replies 12 ·