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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What Is the Angle of Refraction for a Light Ray Incident on Glass at 30 Degrees?
- o0sunny0o
- · Replies 2 ·
Calculating Distance and Time with two boats in a river
- tajivie
- · Replies 3 ·
Uncertainty in Mean Value: How Many Decimal Places?
- Gavroy
- · Replies 2 ·
Where is the Center of SHM in a Light Elastic String System?
- shalikadm
- · Replies 7 ·
How to find the difference between two station?
- louis676
- · Replies 19 ·
Use of Biot-Savart Law for Square Loop
- Sekonda
- · Replies 2 ·
Rotational Equilibrium: Finding Force at Point B and D
- reder
- · Replies 4 ·
Thermodynamics - Thermal Conductivity + Heat Flow
- daleklama
- · Replies 7 ·
Frequency of photons emitted from electrons
- Abidal Sala
- · Replies 1 ·
Polaroid sheets and the law of malus
- cuddlylover
- · Replies 6 ·
Elevator at rest compared to when its accelerating
- Kirasagi
- · Replies 2 ·
Differentiate y component of velocity wrt time
- ZedCar
- · Replies 3 ·
Skier coasting on level snow with friction
- yanase
- · Replies 8 ·
Gravitational question ( calculus )
- peterpang1994
- · Replies 1 ·
Pendulum speed given length and angle
- Kirasagi
- · Replies 10 ·
Volume of a mole of air 15km above sea level
- wannabero
- · Replies 1 ·
Block sliding on wedge in descending elevator with friction
- Perpendicular
- · Replies 6 ·
Why is 2 years in seconds rounded to 3.16 × 10^7 not 3.15 × 10^7?
- delgeezee
- · Replies 3 ·
Calculate percentage change in heat output
- physicist93
- · Replies 3 ·
Horizontal/Vertical projectile question
- influx
- · Replies 7 ·
Light reflected from air film between glass plates
- domyy
- · Replies 1 ·
Bridge Circuit, Solving 5 Equations
- Opus_723
- · Replies 5 ·
Two parallel non conducting rings
- SOS2012
- · Replies 3 ·
I've got to find things out about these pendulums
- thear
- · Replies 1 ·
Recoil velocity of a 4.0 kg gun firing a 10 g bullet
- Molly1235
- · Replies 14 ·
Calculating Ball's Initial Speed: All Gravitational Energy
- jamescutmore
- · Replies 5 ·
Find temperature of ideal gas, given n, P, Vi, Vf, and Work.
- daleklama
- · Replies 4 ·
Solving a Problem with 2.55 eV/4.14 x 10^-15 eVs
- domyy
- · Replies 5 ·
Solving for Heat Capacity and Ideal Gas Type in Thermodynamics
- bhoom
- · Replies 2 ·
Help Solve Lens Projector Distance Puzzle!
- cuddlylover
- · Replies 4 ·
Acceleration Due to Gravity of the Sun
- ideefixem
- · Replies 11 ·
Buoyancy and Density Archimedes
- Koborl
- · Replies 2 ·
What Is the Normal Force on a Rollercoaster Car at the Top of a Hill?
- arrax
- · Replies 3 ·
How Does Frequency Alter Output Voltage in an RLC Circuit?
- Alouette
- · Replies 1 ·
Circular Motion Problem: Multiple Masses
- theed21
- · Replies 1 ·
How Do You Find the Acceleration of Block A Given These Weights?
- Angry Citizen
- · Replies 3 ·
Calculate electric field for cylindrical charge distributions
- aaaa202
- · Replies 5 ·
Determine the number of nodal line present
- TalibanNinja
- · Replies 1 ·
Why Do Horizontal Motion Problems in AS Physics Challenge Students?
- influx
- · Replies 4 ·
Rotational mechanics, angular momentum revision
- Nono713
- · Replies 4 ·
How Is Tension Calculated in a Plucked Telephone Cord?
- nemzy
- · Replies 3 ·
How can light bend toward the normal in refraction?
- yvesers
- · Replies 2 ·
Quick question about Aluminium ? How to find its oxidation state ?
- nukeman
- · Replies 2 ·
Damped Harmonic Oscillator/ME loss/freq question
- jssamp
- · Replies 2 ·
Very basic questions regarding thermal energy and radiation.
- supernova1203
- · Replies 3 ·
Maximum acceleration, frequency and mechanical energy of a spring
- jmgXD6
- · Replies 7 ·
Solved: Dimensions of b/a in Pressure Equation
- physics kiddy
- · Replies 2 ·
Mirror and lens sign conventions for real and virtual images
- DODGEVIPER13
- · Replies 2 ·
Orbital period of satellite about a nonrotating body
- mollybethe
- · Replies 2 ·
Spring with 2 masses rotating and vibrating
- ross0523
- · Replies 1 ·
What is the final velocity of a bullet entering a system after a collision?
- roam
- · Replies 9 ·
Work done by the Friction Force
- nobodyuknow
- · Replies 6 ·
How to Determine the Velocity of a Triangular Block in a Frictionless System?
- Avi1995
- · Replies 4 ·
Finding current through in a specific part of a parallel circuit.
- aliciao
- · Replies 1 ·
Power, Work and Friction Problem
- K.Lewis
- · Replies 3 ·
Conservation of Angular Momentum w/ Spring
- kabailey
- · Replies 12 ·
How Far Does the Pile Move with Each Blow of the Hammer?
- BEANTOWN
- · Replies 3 ·
Why Might a Space Probe with High Launch Energy Not Escape Earth's Gravity?
- Peter G.
- · Replies 3 ·
Circular motion- friction exerted skates/ice and determine friction coefficient
- dani123
- · Replies 4 ·
Force exerted on the wall of a container.
- Dan.kl
- · Replies 1 ·
Can a Rotating Magnet Create a Rotating Magnetic Field?
- StephenD420
- · Replies 5 ·
Muzzle velocity given test range, time of flight and ballistic properties.
- Carpet_Diver
- · Replies 2 ·
Is my sisters science test wrong ?
- rmshepherd
- · Replies 15 ·
When does the speed of a ball thrown in the air start decreasing?
- influx
- · Replies 8 ·
Simple Question: Units and volume of DNA - Can't get formula correct?
- nukeman
- · Replies 11 ·
Find the two maxima for a double grate diffraction
- DODGEVIPER13
- · Replies 1 ·
Are the Red Terms Equal to Zero in This Cross Product Problem?
- sparkle123
- · Replies 6 ·
How to tell is a two lens converging system is inverted or not
- DODGEVIPER13
- · Replies 2 ·
Energy when two opposite pulses meet
- jd12345
- · Replies 1 ·
Calculating Initial Velocity for Projectile Launch from Point A to B
- jgratton
- · Replies 2 ·
IUPAC naming for Ti(CO3)2
- nukeman
- · Replies 2 ·
Accelaration of a sphere being aimed at a point charge
- lukeharvey
- · Replies 3 ·
Why use gauge pressure for plug friction in a submerged pipe
- 09jlk
- · Replies 2 ·
Determine largest force when three ropes are joined at a point
- zeralda21
- · Replies 13 ·
Preparing for a phys final, springs and bouyancy
- Mathephysicst
- · Replies 6 ·
How Is the Initial Speed of a Projectile Calculated Using a Ballistic Pendulum?
- yesiammanu
- · Replies 8 ·
How do I integrate expressions with varying mass and air resistance in a rocket?
- BitterX
- · Replies 6 ·
Finding velocity/distance from acceleration
- Tankertert
- · Replies 8 ·
Simple multiple choice questions
- yesiammanu
- · Replies 3 ·
Period of rod connected to spring
- songoku
- · Replies 24 ·
A point mass attached to a spinning spring.
- NotACrook
- · Replies 7 ·
Projectile Motion of Basketball Shot to Ring
- Chooks
- · Replies 1 ·
Kinematics problems with braking distance, projectile motion, and acceleration
- louis676
- · Replies 2 ·
Design a Toy with Kinematics: Get Creative
- gbaby370
- · Replies 3 ·
Why can't centripetal force formula apply to spring-mass motion?
- kabailey
- · Replies 4 ·
Simple Magnetic Field Question.
- gabloammar
- · Replies 3 ·
Potential Difference in a Circuit
- mollybethe
- · Replies 1 ·
Is the Calculation of Uncertainty for f Correct?
- lavster
- · Replies 7 ·
Finding the amount of heat required to double volume?
- charmedbeauty
- · Replies 1 ·
How can the maximum reading of the ammeter be determined using potentiometers?
- magiclink
- · Replies 5 ·
Calculating Mass and Gravity on Planet Newtonia
- pdiddy94
- · Replies 2 ·
How Does a Flea Jump Over a Cylinder Using Parabolic Motion?
- Perpendicular
- · Replies 14 ·
A few questions about frequency of light
- sokol8
- · Replies 4 ·
Normal Forces and Fluid Dynamics
- mtaniguchi
- · Replies 4 ·
Finding Initial Velocity of a car hit by a train
- Matt4936
- · Replies 7 ·
What is the flow rate through a tapered tube?
- zeralda21
- · Replies 6 ·
Find surface area of a non-conducting sheet
- dk321
- · Replies 1 ·
How does diffraction affect telescope magnification?
- Emilyjoint
- · Replies 41 ·
.Solving for Initial Velocity: Kinematic Equations
- brockp949
- · Replies 1 ·
What is the temperature of the gas?
- Bigworldjust
- · Replies 7 ·