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 long the sun would shine if it converts all it's Hydrogen to Helium
- b_o3
- · Replies 15 ·
Momentum/velocity/position graphs
- hhq5000
- · Replies 1 ·
Optics, camera lenses and object height/size
- map7s
- · Replies 7 ·
Calculating Fluid Velocity in a Constricted Tube
- dylee3
- · Replies 3 ·
Finding Distance Between Lens Positions: Solve for a
- dmolson
- · Replies 1 ·
Two capacitors charged to different potentials when connected
- spudvr
- · Replies 4 ·
What Determines the Thermal Conductivity of Gases?
- x.users
- · Replies 1 ·
Phasor circuit problem: 1 resistor, 1 capacitor, 1 inductor, 1 Voltage source
- VinnyCee
- · Replies 3 ·
What is the tallest straw that you could, in principle, drink from
- ruffkilla
- · Replies 5 ·
Doppler effect sensitive parabolic sound collector
- Rasine
- · Replies 7 ·
Calculating the Transition from Radiation to Matter Dominated Universe
- b_o3
- · Replies 8 ·
Integration questions for my astoronomy class
- b_o3
- · Replies 3 ·
How Does Resistance and EMF Affect Energy Transfer in a Circuit?
- justine411
- · Replies 1 ·
Calculating Work Required to Move Test Charge
- dotcom
- · Replies 7 ·
Focal Length of Thin Lenses in Different Mediums
- map7s
- · Replies 8 ·
How Does a Spinning Platform Affect the Period of a Pendulum?
- ataglance05
- · Replies 1 ·
How High Did Jose Jump Above the Lowest Point on His Bungee Adventure?
- abeltyukov
- · Replies 1 ·
Electric charge to cause spark in air
- flash
- · Replies 10 ·
Why does mass have the force of gravity?
- dhayward
- · Replies 5 ·
Should We Invest in Tracking Space Rocks?
- raman911
- · Replies 11 ·
Diffraction from a circular aperture
- Brewer
- · Replies 2 ·
Moment of Inertia Calculations for Varying Mass Rod and Hollow Ring
- loz1588
- · Replies 5 ·
Finding Distance Above Long Straight Wire Carrying Current
- brunie
- · Replies 1 ·
Finding Spring Constants: An Experiment
- ||spoon||
- · Replies 7 ·
Ultrasonic transducer disk maximum speed in SHM
- abeltyukov
- · Replies 4 ·
Finding the age of the universe at a given redshift
- b_o3
- · Replies 2 ·
Answer: Solve Angle of Refraction in Equilateral Glass Prism (n = 1.35)
- map7s
- · Replies 1 ·
Calculating Coefficient of Static Friction with Oscillating Masses
- abeltyukov
- · Replies 13 ·
Simple fixed axis rotational problem
- emtilt
- · Replies 5 ·
Maximize Battery Lifetime: Drawing a Circuit
- physicsstudent14
- · Replies 3 ·
Checking a Problem: Speed of Bending Rod Tip
- Ja4Coltrane
- · Replies 3 ·
Problems involving electromagnetism
- 21385
- · Replies 1 ·
How can I derive the quality factor in an RLC circuit?
- gazepdapi1
- · Replies 2 ·
Frequency of mass on vertical spring with k=23.5 N/m
- Rasine
- · Replies 3 ·
An Air-Filled Toroidal Solenoid
- GreenMind
- · Replies 1 ·
Minimum rear-view mirror dimensions to see entire rear window
- map7s
- · Replies 2 ·
How Does Doubling Power Output Affect a Kayaker's Speed?
- harmeet_angel
- · Replies 1 ·
Universal Gravitation Problem (Grade 11)
- danielle_54321
- · Replies 3 ·
Semi difficult fusion problem, thanks
- rob36
- · Replies 1 ·
Can a Bird Fly Horizontally in a Cage With Downward Acceleration?
- srikanth.isro
- · Replies 8 ·
How can I calculate the angle of a tilted mirror to see my reflection?
- map7s
- · Replies 2 ·
Solving Buoyancy Problem: Find Depth of Cylindrical Rod
- Shinaab
- · Replies 4 ·
How Can Engineers Safely Demolish a Hotel to Minimize Impact on Local Residents?
- raman911
- · Replies 8 ·
Simple Fluid pressure-force question
- grewas8
- · Replies 2 ·
Moment of inertia of a right triangle
- munther
- · Replies 5 ·
Rotation, Torque, Static Friction
- unique_pavadrin
- · Replies 4 ·
Why fundamental frequency change doesn't match the expected formula
- e(ho0n3
- · Replies 2 ·
Calculating Hydrogen to Helium Conversion in the Sun
- b_o3
- · Replies 14 ·
Angular Momentum of circular disk
- rms830
- · Replies 1 ·
How Does Rewinding a Coil Affect Its Self-Inductance and Energy Storage?
- Soaring Crane
- · Replies 1 ·
Sand/rice/gravel trap investigation
- ChrisYezt
- · Replies 2 ·
How to find sag and tension when adding a second wire to an existing one
- epena
- · Replies 1 ·
Time of flight with air resistance
- Caspian
- · Replies 5 ·
Wavelength and resistance of an LDR
- Deleted member 74205
- · Replies 3 ·
Solving Block on a Sphere: Find Distance Below Top
- anand
- · Replies 3 ·
Energy conservation problem (two star system)
- Jordanosaur
- · Replies 1 ·
Point charges and their movement in 3 space
- Ic3Blu3
- · Replies 3 ·
How Does the Arch Design Enhance the Strength of My Spaghetti Bridge?
- Marghk
- · Replies 1 ·
How Does a Nerve Cell Membrane Model Circuit Behave?
- muscles00gt
- · Replies 1 ·
What Physics Would Allow a Cow to Jump Over the Moon?
- diverse
- · Replies 1 ·
Calculating thermal kinetic energy of a liquid.
- Alex319
- · Replies 2 ·
Proving Friction on an Inclined Surface
- majdeee
- · Replies 3 ·
Velocity of 84 kg Skier Jumper After Jumping 105 m Hill
- raman911
- · Replies 9 ·
Calculating Tension in a Moving System: Ramp Angle, Masses, and Acceleration
- lapo3399
- · Replies 5 ·
Photoelectric effect and Aluminum
- n108
- · Replies 6 ·
What is the Angular Acceleration of a Rod?
- euphtone06
- · Replies 3 ·
Fundamental difference between classical and quantum mechanics
- peps
- · Replies 2 ·
Finding internal resistance of a 5V power supply with three resistors
- Khuwwa
- · Replies 6 ·
How Does Measurement Sensitivity Affect Current Detection in a Circuit?
- Andy_ToK
- · Replies 6 ·
Resistance of a light bulb changing with temperature
- Khuwwa
- · Replies 11 ·
What is the Release Height for a Ball and Disk in a Loop-the-Loop Problem?
- ruffrunnr
- · Replies 1 ·
How to Determine Current and Tension in Parallel Wires with Repelling Forces
- AznBoi
- · Replies 3 ·
How can the invariance of the wave equation be shown without using tensors?
- loonychune
- · Replies 6 ·
How Does Torque Affect Angular Momentum in a Sanding Disk?
- bearhug
- · Replies 7 ·
What Happens to a Ball's Trajectory in a Partial Loop-de-Loop?
- Loren Booda
- · Replies 8 ·
Water and ice reaching thermal equilibrium in an insulated container
- fluvly
- · Replies 2 ·
How Does Light Refraction Affect the Diameter of a Light Cone in a Pool?
- 21385
- · Replies 2 ·
Vectors and the trigonometric function
- nath_quam
- · Replies 4 ·
Difference between angular velocity and angular frequency
- logearav
- · Replies 3 ·
Solve the Rolling Question: Finding Horizontal Acceleration Without Slipping
- BHphy
- · Replies 3 ·
Speed of water reaching the second floor of a building
- fluvly
- · Replies 2 ·
Calculating Speed and Distance in an Inelastic Collision
- fluvly
- · Replies 9 ·
How Do You Calculate the Speed of a Water-Tube Towed by a Boat?
- Varano
- · Replies 3 ·
Faraday's Law of Induction and wire loop
- AznBoi
- · Replies 1 ·
Car slowing on wet unbanked curve with reduced friction
- quickclick330
- · Replies 10 ·
Calculating Energy and Fat Loss in Stair Climbing
- raman911
- · Replies 13 ·
How Do You Calculate Centripetal Acceleration and Friction for a Car on a Curve?
- chamonix
- · Replies 4 ·
How to Calculate Moles of Gas in a Heated Cubical Vessel Over Time?
- f(x)
- · Replies 5 ·
How Fast Should the Smaller Solenoid Move to Induce 2.3V in the Larger Solenoid?
- aleksxxx
- · Replies 1 ·
Roller Coaster/Energy conservation
- Jordanosaur
- · Replies 4 ·
Bullet fired at a Block at rest.
- Trojanof01
- · Replies 2 ·
What is the distance moved by the canoe when a woman walks along it?
- ph123
- · Replies 5 ·
Why Is Empirical Temperature Defined Using Constant Volume Gas Thermometers?
- Kolahal Bhattacharya
- · Replies 1 ·
Buoyancy Formula (Fb, mdg, T etc)
- miava
- · Replies 3 ·
Dropping the Ball: Solving a Physics Problem With 6.8 Joules of Force
- mrb112103
- · Replies 2 ·
Magnetic fields and sodium ions
- AznBoi
- · Replies 2 ·
Help with physics homework problem
- Aikenfan
- · Replies 8 ·
High school physics questions on potential energy, fields, and transformers
- Zeus12345
- · Replies 5 ·
Transverse Wave on a Hanging Cord
- e(ho0n3
- · Replies 4 ·
What is the Work Done in a Ski Rescue?
- fishert16
- · Replies 5 ·