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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Electric field and force between charged plates with different grounding
- Samurai44
- · Replies 10 ·
Tension in the Wire- Thermodynamics Question
- Cookiey
- · Replies 6 ·
Power problem -- Mule pulling a wagon, convert work and power to time
- Kaneki
- · Replies 7 ·
Lead's melting point as a function of pressure (Thermo')
- Robsta
- · Replies 15 ·
Simple harmonic motion period with velocity defined
- PeterRV
- · Replies 6 ·
Can Elastic Collisions Lead to Right Angles Between Particles?
- itsjorge
- · Replies 8 ·
Impulse and Acceleration for a Recoiling Car
- The Head
- · Replies 18 ·
Change in Entropy for Isothermal Compression of Ideal Gas
- LivvyS
- · Replies 6 ·
Adiabatic condition and equation of state
- LivvyS
- · Replies 7 ·
How High Is the Bridge Based on Projectile Motion?
- keithcuda
- · Replies 3 ·
Chain Falling on a Scale: What is the Reading?
- geoffrey159
- · Replies 19 ·
Damped Driven Harmonic Oscillator.
- vkumar1403
- · Replies 4 ·
Absorbtion coefficent and radiation curve
- nbky
- · Replies 5 ·
Calculating velocity with variable acceleration
- scain6043
- · Replies 5 ·
Calculating the Force on impact?
- Tadhg
- · Replies 6 ·
Air machine and compressed air
- Karol
- · Replies 7 ·
Cyclotron Motion Due to Earth's Magnetic Field
- mahrap
- · Replies 1 ·
How Far Does an Object Fall in the Third Second of Vertical Motion?
- jefflee0510
- · Replies 3 ·
Why Must a Calorimeter Be Saturated with Water Vapor?
- Armitage12
- · Replies 6 ·
Calculating temperature from molecular speed distribution
- LivvyS
- · Replies 10 ·
Charges near a conducting plane
- JSGandora
- · Replies 1 ·
Variables This should be easy -- Matched units on LHS & RHS?
- kng1994
- · Replies 4 ·
Wave Speed at the top, bottom, and middle of a Hanging Cord
- FunkyFrap
- · Replies 7 ·
Calculating angular acceleration of a wire
- astrophysics12
- · Replies 1 ·
Plotting a Beam Deflection Graph
- stackemup
- · Replies 8 ·
What is the force needed to stop an 8,000lb tractor moving at 5mph in one foot?
- Eric Ahlvin
- · Replies 2 ·
Two charged nonconducting sphere shells
- JSGandora
- · Replies 3 ·
What Is the Minimal Tension Angle for a Mass Pulled Horizontally?
- Bruneleski
- · Replies 4 ·
What is the Hooke's Law Constant for a Stretched Muscle?
- 8008jsmith
- · Replies 5 ·
Does D equal the field from free charges only in a dielectric?
- Coffee_
- · Replies 8 ·
Why Are There More Energy Levels in Silicon's 3p4p Configuration Than in 3p²?
- Matt atkinson
- · Replies 4 ·
Oscilloscope Sensitivity and Voltage Analysis
- reconrusty
- · Replies 8 ·
Kepler's Law of planetary motion
- Tulatalu
- · Replies 10 ·
How Is Entropy Change Calculated in a Heat Transfer Problem?
- astrophysics12
- · Replies 2 ·
What Are Alternative Methods to Wye-Delta for Calculating Equivalent Resistance?
- arpon
- · Replies 3 ·
Prove Conservation Laws Prevent H+H->H2 Reaction
- geoffrey159
- · Replies 9 ·
How to Determine Pi Groups for Fluid Flow Through an Orifice
- Capablecactus
- · Replies 2 ·
An application of Dynamics, very difficult, really
- PhysicStud01
- · Replies 31 ·
How Do You Convert Gallons to Metric Units and Calculate Paint Thickness?
- kng1994
- · Replies 2 ·
How Does an Accelerating Charge Produce Electromagnetic Pulses?
- RMZ
- · Replies 1 ·
Rearranging Q = 2π(E/ΔE) to find fractional energy loss
- Ryan McDonald
- · Replies 28 ·
Why does average voltage use limits π/2 to 3π/2 instead of 0 to π/2?
- ranju
- · Replies 18 ·
Wavelength of water waves from two coherent sources in ripple tank
- Quantum Fizzics
- · Replies 2 ·
Inflatable seatbelt pressure calculation for airbag deployment
- sdawkins
- · Replies 5 ·
How Can You Alter the Speed of an Object in Circular Motion?
- FaroukYasser
- · Replies 4 ·
Magnetic field caused by an accelerating electron?
- 21joanna12
- · Replies 26 ·
Gravitational field strength of a mass
- Tulatalu
- · Replies 17 ·
Meaning of 'applied field' in Clausius-Mosotti derivation
- Coffee_
- · Replies 1 ·
How Does Permittivity Affect Energy Transmission in EM Waves?
- diracdelta
- · Replies 3 ·
Energy transfer in Newton's cradle
- Rya_Sly
- · Replies 2 ·
How Does Rotational Inertia Affect the Motion of a Sphere on a Moving Ramp?
- Benton
- · Replies 2 ·
Calculating energy left in oscillator after 3 cycles
- Ryan McDonald
- · Replies 16 ·
Figuring out changes in Intensity (Inverse Square Law)
- RichardGib
- · Replies 1 ·
Spaceship falling toward a dust disk: finding acceleration
- dmk90
- · Replies 2 ·
Capacitor Addition in Rectifier Circuit: Impact on Waveform and Explanation
- PhysicStud01
- · Replies 2 ·
Two questions about introductory EM confusions.
- Coffee_
- · Replies 6 ·
Why does my elevator scale reading come out negative?
- joyce1029
- · Replies 7 ·
Gravitational Potential Energy of a fall
- julianwitkowski
- · Replies 16 ·
Induced Current in an AC generator
- AAAA
- · Replies 11 ·
Drawing a Circuit from Voltage-Time Graph
- friendbobbiny
- · Replies 7 ·
Calculating Force Exerted by Water at Nozzle
- Ragnar1995
- · Replies 21 ·
Voltage of tangent spherical conductors with charge density ρs=ρ0cos²θ
- pitbull
- · Replies 4 ·
Is acceleration vector or scalar?
- jumbogala
- · Replies 8 ·
Electromagnetic Radioation Optics
- AndrewTT
- · Replies 1 ·
Minimum stopping distance for tree on trailer with friction
- Alpha123
- · Replies 8 ·
Is Thinking Distance Proportional to Speed in Car Braking?
- Lols
- · Replies 5 ·
Biot-Savart for current density in a volume
- henrybrent
- · Replies 11 ·
Where does the 2 come from in the vertical motion equation for projectiles?
- Sonny18n
- · Replies 15 ·
Net electrostatic force on three charged objects
- Mori
- · Replies 13 ·
Calculate energy of vertical oscillating spring
- Samuelriesterer
- · Replies 2 ·
Time Difference between two inertial frames of reference
- MEGA-DEEN
- · Replies 1 ·
Calculating Charge Q from Electric Field at a Point
- acdurbin953
- · Replies 6 ·
Dew point and absolute humidity
- Karol
- · Replies 3 ·
Unable to solve an approximation
- Kidiz
- · Replies 5 ·
Find the Height of the Elevator
- Cake
- · Replies 9 ·
How to calculate external force acting on a pendulum
- Kenny Bala
- · Replies 1 ·
Photoelectric Effect - Laboration
- Gunnar9711
- · Replies 1 ·
The relationship between angle of incline and friction force
- bijou1
- · Replies 10 ·
What pivot point maximizes a uniform bar's oscillation frequency?
- pitbull
- · Replies 4 ·
Static friction for a ball rolling without slipping
- Lola Luck
- · Replies 9 ·
Find Mass of Object X for Centre of Inertia to Match Vehicle Tyre's Axis
- Valdes
- · Replies 13 ·
Max Reaction Time to Avoid Obstacle 95m Away
- rrosa522
- · Replies 2 ·
How Does Temperature Distinguish Thermal States in Equilibrium?
- pitbull
- · Replies 2 ·
How Do You Balance Forces in a Bicycle Free Body Diagram?
- ultra york
- · Replies 3 ·
Current in a zero-resistance loop when magnetic field is turned on
- Coffee_
- · Replies 11 ·
Find the average force of friction
- keithcuda
- · Replies 6 ·
Proving cos^2(\theta_x)+cos^2(\theta_y)+cos^2(\theta_z)=1
- Cake
- · Replies 9 ·
Principle of linear momentum for a rocket
- oOoOoOo
- · Replies 6 ·
Electric potential at surface sphere problem?
- PhysicStud01
- · Replies 9 ·
Finding decibel level from intensity 1.0 × 10⁻⁵ W/m²
- RichardGib
- · Replies 4 ·
What Is the Total Charge in a Non-Uniform Spherical Charge Distribution?
- henrybrent
- · Replies 22 ·
Where Should the Slider Be Positioned on a Loaded Potentiometer?
- StokeBoy
- · Replies 6 ·
Dipole in an external electric field
- Prashasti
- · Replies 3 ·
Can't get my head around reduced mass (particle physics)
- Flucky
- · Replies 3 ·
How Does an Object's Weight Change from Earth to Moon?
- XylophoneDealer
- · Replies 6 ·
Does F = k·u × v produce circular or spiral motion?
- Anastasis Pk
- · Replies 4 ·
Finding the reaction force on a 5m mass
- bomberkid
- · Replies 7 ·
How Long Does It Take to Fall from a Cliff?
- reyrey389
- · Replies 3 ·
Lorentz Transformation - Clock
- CGM
- · Replies 8 ·
About the angle between force and displacment, W=F.d cosƟ
- Sculter
- · Replies 6 ·