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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Five train cars and their final speed
- brunettegurl
- · Replies 3 ·
Newton's 3rd law and spacewalking
- sunbunny
- · Replies 9 ·
Energy in a Capacator with a Diaelectric
- r16
- · Replies 5 ·
Determine the value of the resistance R that will produce a current
- science.girl
- · Replies 11 ·
The Physics of Friction: Why Rough Wood Has More Friction
- ShootingStars
- · Replies 2 ·
Snowball sticks to man on frictionless pond
- chel
- · Replies 23 ·
How close can a polar bear get to an iceberg's edge before water overflows?
- Myvalq
- · Replies 1 ·
How Do You Calculate Stress on a Piston Rod?
- aaronjason
- · Replies 1 ·
Hershey park/ Physics day Problems
- ariol
- · Replies 1 ·
Calculating Changes in Enthalpy and Entropy for Isobaric Gas Expansion
- Trenthan
- · Replies 2 ·
T(1/2)+ \sqrt{3}. T ( \sqrt{3}. /2) = 100
- chawkdee
- · Replies 1 ·
Finding rate of change of electric flux in a charging capacitor
- Minihoudini
- · Replies 5 ·
What is the final velocity of the five-car train after a series of collisions?
- grewas8
- · Replies 3 ·
Canoeist Weight Distribution: How Far Can He Reach Without Getting Wet?
- gtaylorMD
- · Replies 1 ·
Two speakers driven by the same force
- aaronb
- · Replies 1 ·
Rest energy and Kinetic Energy of a Photon - velocity?
- max8404
- · Replies 5 ·
How Fast Does a Cylinder Roll Down an Inclined Plane?
- irony416
- · Replies 1 ·
Block of wood pushed up a wooden ramp
- talaroue
- · Replies 24 ·
Weather balloon in wind, find displacement
- steckona
- · Replies 1 ·
Photoelectric effect and cutoff frequency
- lha08
- · Replies 6 ·
When to launch a rocket to Mars if it's 60.1 degrees ahead?
- Digdug12
- · Replies 1 ·
How much does a barge rise when 7 tonnes of grain is removed?
- cd19
- · Replies 9 ·
Atmospheric density from altitude, temperature, pressure and humidity
- OOPz
- · Replies 2 ·
Calculating Earthquake Force with Pendulum Measurements
- MonsieurWise
- · Replies 3 ·
Concave lens in water with negative focal length
- indie452
- · Replies 2 ·
Proving Acceleration of A ≤ Acceleration of B
- rohitarura
- · Replies 13 ·
Sliding/toppling of a block on a ramp
- melpomenne
- · Replies 15 ·
Time for block A to reach 2 m/s using impulse and momentum
- joemama69
- · Replies 8 ·
Calculating Single Slit Diffraction Width with 630 nm Light
- muffintop
- · Replies 4 ·
How Much Energy Is Needed to Drag a Block Over a Distance?
- indie452
- · Replies 1 ·
Finding the currents in this system
- Dell
- · Replies 5 ·
Young's Modulus of Copper Wire: N/m Value
- Sassenav22
- · Replies 2 ·
Wave functions and probabilities
- kidsmoker
- · Replies 3 ·
Interference pattern, wavelength
- muffintop
- · Replies 1 ·
Induced current in a square loop with non-uniform magnetic field B = 0.790y²t
- theowne
- · Replies 6 ·
Calculate density A graduated cylinder
- danny411
- · Replies 6 ·
Sliding Rod In A Magnetic Field (w/ Static Friction)
- SMA83
- · Replies 4 ·
Mechanics, PE to position function
- tjkubo
- · Replies 8 ·
Particle with constant acceleration: scalar product, vector product, and position
- Lord Dark
- · Replies 1 ·
Hydrostatics - submerged lamina
- cd19
- · Replies 1 ·
Electric Force and Potential Energy Calculations
- science.girl
- · Replies 2 ·
What is the Velocity of a Car with Constant Acceleration?
- bns1201
- · Replies 6 ·
Power in a parallel RLC circuit as a function of frequency
- Slepton
- · Replies 8 ·
Calculating Energy Stored in Capacitors in a Series Circuit
- Nimmy
- · Replies 12 ·
Finding the Spring Constant of a Water-Balloon Launcher
- Minte
- · Replies 1 ·
Bullet fired and penetrates a block of wood
- talaroue
- · Replies 11 ·
Calculating EMF and Current in a Circuit with Internal Resistance
- Gunner1412
- · Replies 4 ·
Trouble with a density mass problem
- seacow
- · Replies 3 ·
Finding the fraction of electrons lost
- jheld
- · Replies 2 ·
What is the Force Constant for Gaseous 14N16O?
- jester07232
- · Replies 4 ·
Earth's magnetic field ten times superior to what's expected
- Renji
- · Replies 1 ·
What Is the Speed of the Composite Object After Collision?
- cooney88
- · Replies 11 ·
How does a collision at an angle affect momentum calculation?
- cd19
- · Replies 4 ·
What are some suitable topics for a paper about physics?
- XodoX
- · Replies 5 ·
Are amp-seconds the same as capacitance?
- jamba88
- · Replies 2 ·
Calculating Depth of Immersion of an Ice Cone in Water
- cooney88
- · Replies 1 ·
Conceptual Question: Energy of ions across a voltage difference
- ebonySCYTHE
- · Replies 2 ·
Batteries in Parallel vs. Batteries in Series
- jamba88
- · Replies 1 ·
Calculate Maximum Spring Compression: 0.4 kg Object, 80 N/m Constant
- cooney88
- · Replies 5 ·
Solving Motion Equation: Transposing s=ut + 1/2at^2 for a
- Sassenav22
- · Replies 2 ·
Something weird about Rotational Kinematic Equations
- Stefenng
- · Replies 4 ·
Is Work Done During Changes in State?
- DarylMBCP
- · Replies 2 ·
What data do I need to calculate fan power and efficiency?
- novice_user31
- · Replies 1 ·
Strain energy of springs in series with 40mm extension
- Stefenng
- · Replies 2 ·
Finding moles of gas given pressure, volume, and temperature
- chawkdee
- · Replies 8 ·
Static equilibrium for ladder against frictionless wall with firefighter
- xdevinx
- · Replies 1 ·
Time for boats to reach separation distance d
- perdita_x
- · Replies 6 ·
Tetherball - Classical Mechanics
- Pigkappa
- · Replies 10 ·
Does Terrain Affect Bullet Travel Distance in Sniping?
- johnsmi
- · Replies 1 ·
Solving a Physics Magnification Problem with a 6cm Focal Length Magnifier
- disk256
- · Replies 1 ·
Stopping a Train: Calculating Time from Velocity
- rogetz
- · Replies 1 ·
Proving the spacetime interval is invariant across reference frames
- authenticgeek
- · Replies 1 ·
Does the Cross Product of -k and -i Result in +j?
- max8404
- · Replies 2 ·
Electric Charges Homework: Potential Difference & Capacitance
- science.girl
- · Replies 2 ·
Finding time a ball is in the air
- mcryder16
- · Replies 2 ·
Calculating Acceleration of a Rocket Launch
- leafgirl115
- · Replies 15 ·
Weather rocket constant acceleration and speed at altitude
- BOTG
- · Replies 1 ·
Measuring the Height of Mountains on the Moon
- bababooey
- · Replies 1 ·
How to find velocity given coefficient of friction, distance, mass and v1?
- Ingrid44
- · Replies 1 ·
Newton's 2nd law and Lorentz Force
- Dvsdvs
- · Replies 6 ·
How Does the Biot-Savart Law Apply to Uneven Currents in a Split Loop?
- GDGirl
- · Replies 4 ·
How Fast Was Randy Barnes' Record-Setting Shot Putt?
- leviathanX777
- · Replies 1 ·
What is the Net Force on B in an Equilateral Triangle of Point Charges?
- axxon
- · Replies 8 ·
What is the Length of the Ski Slope?
- mcryder16
- · Replies 4 ·
What Steepest Slope Can a Train Climb Without Slipping on Frosty Rails?
- cd19
- · Replies 5 ·
How far apart the stop signs are
- mcryder16
- · Replies 1 ·
Light intensity from a source on a solar panel at different distances
- corduroyyy
- · Replies 2 ·
Calculating Distance Traveled: Motion Exam Question Solution in 7.4 Seconds
- mouk92
- · Replies 5 ·
Sabine's reverberation time equation and large spaces
- peter mcc
- · Replies 2 ·
Food value of a peanut from water temperature change with 40% efficiency
- ashvuck101
- · Replies 9 ·
Speed and acceleration of a stone on a rotating tire
- Lord Dark
- · Replies 4 ·
Steady State Ideal Gas Where Do I start
- CRich
- · Replies 13 ·
What is the formula for finding initial velocity from acceleration and distance?
- mcryder16
- · Replies 3 ·
Calculate the tension in the tie-rope between the rod and the wall
- Lord Dark
- · Replies 3 ·
Calculating Particle Speed with Relativity
- GingerToast21
- · Replies 2 ·
Projectile Motion (Ball thrown Hortizonally)
- talaroue
- · Replies 3 ·
Some electrodynamics questions (waves)
- twotaileddemon
- · Replies 10 ·
How Is Force Calculated When an Object Hits the Ground?
- cd19
- · Replies 6 ·
How Long Does It Take for Two Rocks Thrown from a Bridge to Hit the Water?
- mcryder16
- · Replies 1 ·
Toy train with sticking wheel: finding deceleration
- mcryder16
- · Replies 1 ·