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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How many Excess Electrons are in a Typical Lightning Bolt?
- chops369
- · Replies 2 ·
Confusion with work and constant velocity
- okgo
- · Replies 1 ·
Trouble finding velocity equation
- jjlandis
- · Replies 2 ·
Minimum index of refraction for total internal reflection in a prism
- aimslin22
- · Replies 4 ·
Rotational Motion: Disc Movement
- kikidoll
- · Replies 1 ·
Rotational kinematics on a plane
- dherm56
- · Replies 2 ·
Determining the number of photons that reach the earth
- phys62
- · Replies 4 ·
Where Should I Drill the Hole to Minimize the Period of a Physical Pendulum?
- nns91
- · Replies 5 ·
How do I calculate average emf?
- synergix
- · Replies 5 ·
Why is the square root of (v^2 + u^2) used in the equation for momentum?
- lordloss
- · Replies 2 ·
Finding Resonating Frequencies in Pipes
- metsjetsfan
- · Replies 3 ·
What is the Formula for Determining Height in Newton's Law of Gravitation?
- science_rules
- · Replies 5 ·
What Is the Minimum Magnetic Field Strength to Move a Rod in a Magnetic Field?
- Dopefish1337
- · Replies 10 ·
Work Problem/Graph Given/Find final velocity.
- myxomatosii
- · Replies 2 ·
Equilibrium and gravity on a uniform beam
- alexandertg6
- · Replies 1 ·
Maximum Tension in Vine for Tarzan and Jane Pendulum
- estie
- · Replies 10 ·
Electric field of charged particles problem
- kevinf
- · Replies 7 ·
Velocity and Acceleration of the Center of Mass?
- Scarlitt14
- · Replies 3 ·
What is the magnitude of the magnetic field .
- superjen
- · Replies 8 ·
Submarine floating with air-filled ballast tanks using Archimedes' principle
- Jite
- · Replies 3 ·
Specific heat problem simple, but im missing something ?
- jenzao
- · Replies 9 ·
Finding mass of charged particle in circular motion through magnetic field
- rinarez7
- · Replies 1 ·
Calculating Acceleration of a Cyclist on a Starting Ramp
- jaron
- · Replies 6 ·
True or False:Gravitation & Circular Motion Concepts
- science_rules
- · Replies 2 ·
Conservation of Momentum of cannonballs
- okgo
- · Replies 1 ·
Ball rolling off a roof and resultant force from two forces
- memoi567
- · Replies 1 ·
How Do You Calculate Tension in Strings Supporting a Meter Stick in Equilibrium?
- dance0486
- · Replies 1 ·
Calculating Angular Momentum and Torque for a Particle in the XY Plane
- ChazyChazLive
- · Replies 4 ·
Magnetic field at points between two parallel current-carrying wires
- JMoore0150
- · Replies 4 ·
Finding 17 resistor combinations for given voltage and current ranges
- tiger00
- · Replies 3 ·
Force on a wire loop from a nearby straight wire carrying current
- JMoore0150
- · Replies 1 ·
Solving Torque/Force Problem: Find F & R
- RileyAllen
- · Replies 1 ·
Forces on a person in an elevator at rest and accelerating
- science_rules
- · Replies 19 ·
Law of conservation of energy problem
- leapoldstotch
- · Replies 2 ·
What is the Wavelength of an FM Radio Wave at 107.5 MHz?
- shimizua
- · Replies 6 ·
Integrating Torque With Force as a Function of Radius
- ztluhcs
- · Replies 3 ·
Intensity of the incident light
- vrobins1
- · Replies 1 ·
Electric Potential (Charged Plane)
- GDGirl
- · Replies 1 ·
Skier on slope friction and kinematics problems
- weiseguy
- · Replies 7 ·
Choosing between equivalent graph forms for frequency and period
- tommyleehutch
- · Replies 1 ·
Q/m of a particle in a straight line.
- zyphriss2
- · Replies 1 ·
How Do Lorentz Transformations Confirm a Rocket's Motion in Special Relativity?
- Onias
- · Replies 1 ·
What Speed Should You Push a Box of Nails Down a Roof?
- Sethwell
- · Replies 1 ·
Angular acceleration and speed of rotating disk
- fusionxtc
- · Replies 1 ·
Finding pendulum length from kinetic energy vs. angle graph
- pingpong240
- · Replies 2 ·
What equation to use for projectile motion problems
- pickle37
- · Replies 4 ·
Need to find the current in a wire
- seagoing
- · Replies 2 ·
Cant determine vrms, even though equations are all correct.
- jenzao
- · Replies 2 ·
Why do objects of different masses fall with the same acceleration?
- drinkingstraw
- · Replies 10 ·
Electric Fields Question (deflection? :S? and more)
- 037810
- · Replies 7 ·
Period of pendulum on inclined cart and clock error at different heights
- nns91
- · Replies 10 ·
Pendulum-displacement-amplitude of vibration
- kcmccraw
- · Replies 2 ·
Kinetic energy's dependence on velocity.
- Yuqing
- · Replies 1 ·
Similar to calculating distance of photon traveling in space?
- adc22
- · Replies 3 ·
Bullet penetration into wood block on frictionless surface
- yb1013
- · Replies 2 ·
Can a Two-Slit Interference Experiment Display a Particle Model of Light?
- pillanoid
- · Replies 6 ·
Calculating Tension for Fence Post Straightening
- fableblue
- · Replies 12 ·
How long will it take the zinc to reach the desired thickness?
- rayhan619
- · Replies 4 ·
Static Equilibrium Climber Problem
- craig22
- · Replies 1 ·
How Fast Must the Race Car Go in the Last 2 Laps to Qualify?
- katyross
- · Replies 1 ·
Slits per cm on diffraction grating
- msk172
- · Replies 5 ·
Spring constant/ block question
- ladiesman2271
- · Replies 14 ·
Minimum angle required for resolution
- msk172
- · Replies 7 ·
Who Ages More: Mork or Mindy at 99.1% Light Speed?
- masonlane
- · Replies 1 ·
How Is the Angular Width of a Central Diffraction Maximum Calculated?
- msk172
- · Replies 1 ·
Solve Ampere's Law Problem for Uniform Current Density
- Crazy Gnome
- · Replies 1 ·
Calculating the Distance Between Interference Maxima: Yellow Light
- SEEDS
- · Replies 1 ·
Solving Gas Expansion in Equal Containers
- emily710
- · Replies 2 ·
Electric Potential (charged conducting sphere)
- GDGirl
- · Replies 8 ·
Impulse and Momentum: Gernade Problem
- Avis
- · Replies 3 ·
Finding the maximum electric field along a uniformly charged ring's axis
- physics_geek
- · Replies 7 ·
Calculating Acceleration, Work, and Power for a Sled Pulled at an Angle
- Draggu
- · Replies 2 ·
A reversed funnel problem (static fluid mechanics)
- fluidistic
- · Replies 9 ·
What Equation Calculates Magnetic Field Strength in a Solenoid?
- jimbo71
- · Replies 2 ·
How far behind the front wheels is the center of mass located?
- superjen
- · Replies 5 ·
Impulse Needed to Stop a Moving Object Using Momentum and Newton's Laws
- phys99
- · Replies 5 ·
Why do photoelectric effect electrons have different kinetic energies?
- confuse
- · Replies 5 ·
Early test flights for the space shuttle used a glider
- kritzy
- · Replies 3 ·
Radio Telescope at Arecibo, Puerto Rico
- JSapit
- · Replies 2 ·
Box landing in rolling container: energy and momentum
- Lord Dark
- · Replies 6 ·
Calculating Total Acceleration in a Tennis Serve
- mattmannmf
- · Replies 5 ·
Solving the momentum and energy equations for an elastic collision
- vorcil
- · Replies 13 ·
How Do You Determine Quantum Numbers from Excitation Potentials?
- Davio
- · Replies 5 ·
Law of cosines/ Parallelogram rule
- fableblue
- · Replies 6 ·
How Does Thomson's Experiment Calculate Electron Deflection?
- xinlan
- · Replies 21 ·
Relationship between work and kinetic energy
- lemonpie
- · Replies 2 ·
Calculating Intensity of Unpolarized Light with Polarizers
- hardwork
- · Replies 10 ·
How Can I Improve My Understanding of Physics Equations Like Boyle's Law?
- WannabChemist
- · Replies 1 ·
How Is Energy Transferred in a Spring-Launched Block on an Inclined Plane?
- wanamaa
- · Replies 4 ·
For a science experiment you need to electroplate
- rayhan619
- · Replies 12 ·
How much work is done when moving a charge?
- iceman2048
- · Replies 2 ·
Gravitational Potential Energy of a Child in a Swing: Ropes Horizontal"
- aaronb
- · Replies 1 ·
Why is there no total internal reflection at the oil-water interface?
- roeb
- · Replies 1 ·
Calculate Strain of a Cable: 10-m Long w/ 25-N Sign
- pippintook
- · Replies 4 ·
Magnet experiment performed by a math major (yikes)
- tennesseewiz
- · Replies 3 ·
Centripetal acceleration of spinning disk edge
- mattmannmf
- · Replies 1 ·
Initial angular speed of fan after switching to LOW
- mattmannmf
- · Replies 10 ·
Angular Displacement at Specific Times
- mattmannmf
- · Replies 6 ·
Particle, kinetic energy, decay point
- Yroyathon
- · Replies 5 ·