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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If the earth's ice caps melted, how long would a day last?
- Gold3nlily
- · Replies 1 ·
Minimum Initial Velocity for Deuterium Fusion in Center-of-Mass Frame
- akmphy
- · Replies 1 ·
Calculating Speed of Approaching Police Car Using Beat Frequency
- mike91
- · Replies 6 ·
How Do You Solve Kinematics Problems Involving Quadratic Equations?
- Falinox
- · Replies 3 ·
Period of Pendulum When Moving Axis Closer to COM
- chewytess
- · Replies 1 ·
Induced Current Direction in a Moving Square Loop
- flyingpig
- · Replies 17 ·
Direction of Induced Current in a Small Loop Inside a Solenoid
- SaraF
- · Replies 4 ·
Ohms law question. Series and Parallel in same circuit.
- doublea500
- · Replies 1 ·
Two skater's momentum after collision
- teggenspiller
- · Replies 6 ·
Effective nuclear charge for outer electron of Lithium
- frozenguy
- · Replies 2 ·
Why does power loss equal I²R with two current factors?
- selishaphysic
- · Replies 8 ·
Simple Harmonic Motion of a 2kg particle
- chewytess
- · Replies 7 ·
What Could Be Wrong with My Wave Function Equation?
- lina29
- · Replies 2 ·
Finding a toy to demonstrate gravity, force, mass and weight
- kewlcat100
- · Replies 1 ·
Hydrogen emission spectrum diagram
- iym185
- · Replies 3 ·
Why do hailstones hurt more than raindrops when they hit you?
- planauts
- · Replies 9 ·
Electric motor efficiency and potential between parallel plates
- Aravsion
- · Replies 9 ·
Simple harmonic motion spring problem
- Dylan.Wallett
- · Replies 4 ·
How Does Doubling Frequency Affect R-L-C Series Circuit Components?
- meryom
- · Replies 8 ·
Rigorous proof about the nature of rolling motion
- quincyboy7
- · Replies 1 ·
Friction force for a rolling wheel?
- quincyboy7
- · Replies 2 ·
Wave Interference - Phase Difference
- planauts
- · Replies 2 ·
Understanding Carbon Decay: Solving for Decay Rate
- jimmy42
- · Replies 4 ·
Moment of force, stabilising a board carried over shoulder
- Rbraind
- · Replies 6 ·
Vector Notation: Struggling to Reconcile Directions
- quincyboy7
- · Replies 4 ·
What is the Force on a Current Loop in a Magnetic Field?
- james11223
- · Replies 8 ·
How Do I Calculate the Final Velocity of a Trolley?
- hutchiee
- · Replies 3 ·
Find the speed of the 2nd-order maxima on the screen
- burgerkin
- · Replies 1 ·
How Many Excess Electrons Does a Charged Sphere Have?
- ishterz
- · Replies 3 ·
How Tall is the Tree in the Plane Mirror Problem?
- CaneAA
- · Replies 3 ·
Bicycle Wheel; Gyroscopic Action
- LareeRudi
- · Replies 4 ·
How Does Friction Affect the Final Velocity of a Block on an Incline?
- dancing123
- · Replies 1 ·
Trouble with Log Laws and exponential functions
- pdas
- · Replies 10 ·
Work done by liquid's frictional viscosity
- imatreyu
- · Replies 4 ·
Volume Flow Rate, Velocity, Factors
- karmatic
- · Replies 1 ·
Which way does light travel in refraction through a water droplet
- seasaltsara4
- · Replies 6 ·
Radioactive Dating: Age of Ancient Rock Determined by Half-Life
- reree17
- · Replies 1 ·
Deriving the diffraction grating equation with incidence and diffraction angles
- Emidy
- · Replies 1 ·
Induction stove-principle involved?
- logearav
- · Replies 1 ·
Deriving Big 5 Motion Laws Non-Calculus and Calculus
- quincyboy7
- · Replies 1 ·
Projectile Motion (Initial Velocity)
- Milkster18
- · Replies 33 ·
Direction of Electric Field vs. Electric Force
- Core2uu
- · Replies 2 ·
Calculating the Compression Distance in an Inelastic Collision with a Spring
- dancing123
- · Replies 4 ·
Average Power and speed of a car
- nagaromo
- · Replies 7 ·
Decays per second, finding mass
- ronpaulkid
- · Replies 1 ·
What Is the Initial Velocity of the Bullet?
- PreetiM
- · Replies 5 ·
How Do Key Swings Maintain a Circular Path?
- farhannaeem
- · Replies 3 ·
What is the Distance of Closest Approach Between Two Point Charges?
- purduegirl
- · Replies 5 ·
Velocity of a sinussodial function
- notsam
- · Replies 1 ·
Calculating the closest possible distance of approach
- rreedde
- · Replies 3 ·
Why does a boulder fall at the same speed as a coyote?
- sciencequest
- · Replies 8 ·
Projectile Motion of Apple Core from a Tree
- farhannaeem
- · Replies 1 ·
Bus Circular Motion: Calculating Minimum Friction for Laptop Stability
- farhannaeem
- · Replies 5 ·
Bending Wires and Magnetic Fields?
- albert1993
- · Replies 2 ·
Ammeter in a problem, calculating currents
- Femme_physics
- · Replies 4 ·
How Does Newton's 3rd Law Allow Movement Despite Opposing Forces?
- galiciadba
- · Replies 2 ·
Centripetal Force; calculating speed
- Macrowave
- · Replies 4 ·
What are the Values of x, y, z for Mechanical Energy to be Positive?
- SpY]
- · Replies 2 ·
The Motion of Charged Particle in Electric Fields Problem
- Freeq
- · Replies 2 ·
Juggler throws 2 balls - when do they pass
- Rbraind
- · Replies 2 ·
Why Does a Cake Tin Burn You Faster Than Air in a Hot Oven?
- danago
- · Replies 6 ·
How can I determine the initial velocity of a ball thrown towards a ceiling?
- ashlee.m
- · Replies 2 ·
How Is Work Calculated in a Vector Field?
- Duncan1382
- · Replies 2 ·
How Is Angular Velocity Affected by Torque in a Multi-Pulley System?
- Yapper
- · Replies 3 ·
Work and entropy changes in a monatomic ideal gas cycle
- tigers4
- · Replies 3 ·
Racing to the Finish: A Boy Paddles from Point 1 to Point 7
- physicdummy
- · Replies 3 ·
Simple pendulum: find length from period, max angular velocity and acceleration
- Mattmiles
- · Replies 4 ·
Calculating Amplitude of a Simple Pendulum
- Mattmiles
- · Replies 1 ·
How Do You Calculate a Battery's Voltage with Different Resistors?
- fran1942
- · Replies 3 ·
Torque to linear acceleration.
- Yapper
- · Replies 4 ·
Skateboarder projectile motion maximum height
- Procrastinate
- · Replies 3 ·
How Much Energy is Needed to Heat Air in a Movable Piston Cylinder to 755 K?
- lackos
- · Replies 1 ·
Thermal Expansion of brass rod
- lackos
- · Replies 1 ·
Specific Latent Heat of Vaporization vs Evaporation
- Peter G.
- · Replies 3 ·
Capacitance and max field strength of a concentric sphere capacitor
- Andzus
- · Replies 4 ·
Solving for Initial Velocity v with No Oscillation
- cloud360
- · Replies 38 ·
What is the Photoelectric Effect?
- pugtm
- · Replies 5 ·
Derive equation for voltage across a capacitor
- Fionn00
- · Replies 5 ·
Specific Heat Capacity Answer Wrong, yet no error to be found
- Gutter
- · Replies 11 ·
Heat Engine with Finite Heat Capacity- Is my answer correct?
- G01
- · Replies 3 ·
Calculating Work Done on a Crate on an Incline
- teggenspiller
- · Replies 6 ·
Acoustics and Frequency Question (easy)
- sobo22
- · Replies 3 ·
Question Polarization of Matter
- wared_wam
- · Replies 2 ·
Calculating Braking Torque for a Flywheel
- andycampbell1
- · Replies 2 ·
Screen width needed for Young's double slit interference pattern
- jmm5872
- · Replies 1 ·
Gaming device battery life with 120 ppi screen and 5V battery
- cupcuppycup
- · Replies 1 ·
Projectile Motion Practice Questions and Solutions
- vivekfan
- · Replies 2 ·
Conceptual question: Newton's Laws
- mateomy
- · Replies 1 ·
How does Ampere's Law apply to a long thick slab on the z axis?
- Kvm90
- · Replies 2 ·
Where is the net electric field zero for two fixed charges on an x axis?
- Wables
- · Replies 5 ·
Proving an Identity Involving Gamma Matrices
- Kalimaa23
- · Replies 3 ·
Water vs Steam Burns: Which is More Severe?
- pavadrin
- · Replies 4 ·
Mass wraps around rod in circular motion
- unscientific
- · Replies 3 ·
Connected Capacitors: Charge & Potential Diffrences
- andrewdavis23
- · Replies 1 ·
Solve Kinematics: Find Velocity & Displacement of Speedboat
- iaberrant
- · Replies 1 ·
What is the relationship between pressure and depth in a scuba diver's lungs?
- notsam
- · Replies 11 ·
How Do Support Posts Affect Equilibrium in a Planked System?
- Barkingwalrus
- · Replies 3 ·
Tension in vertical circular motion with a ball on a string
- songoku
- · Replies 4 ·
Modern Physics - Length of infinite well that has an electron
- fallen186
- · Replies 1 ·
Why does the combined force on the ramp and pole seem to exceed the total force?
- Samky
- · Replies 8 ·