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 speed of the roller coaster at the bottom of the dip?
- Amber430
- · Replies 3 ·
3 masses attached by rope on table with 2 pulleys.
- MaximaMan
- · Replies 13 ·
Derive electric field of infinite plane from field of infinite line
- theneedtoknow
- · Replies 8 ·
Work Done on 46 kg Box by Forces: Applied, Frictional, Normal, Gravity
- Amber430
- · Replies 3 ·
How Do You Calculate Moles of Water Vapor in Air Using Ideal Gas Law?
- owura143
- · Replies 1 ·
How Do You Calculate the Height of a Waterfall Based on Temperature Change?
- echoindia756
- · Replies 3 ·
Force and Motion Sliding/Hanging Blocks
- Shatzkinator
- · Replies 3 ·
Uncertainty in Sound Recorder Measurements: Finding the Average and Range
- Davronbek
- · Replies 3 ·
How to Calculate Time and Distance for a Plane Flying with Wind and Vectors
- cwalden91
- · Replies 2 ·
What is the Evidence Supporting the Doppler Effect in Sonic Booms?
- iFat
- · Replies 10 ·
Reducing Uncertainty in an Experiment to 0.012 s
- bocobuff
- · Replies 3 ·
Calculating Thermal Energy Dissipated from Brakes on a Descending Car
- Stryder_SW
- · Replies 2 ·
Calculating Force Components for U = 7x^2 + 9xy + 3(y^2)z
- Stryder_SW
- · Replies 2 ·
Calculating work using the dot product of force and displacement vectors
- Jordash
- · Replies 2 ·
Average Velocity vs. Instantaneous Velocity
- crazyecto
- · Replies 4 ·
Finding constant angular acceleration from wheel revolutions
- underoathP
- · Replies 6 ·
Electric Potential/Work Question
- APerdigon
- · Replies 1 ·
Why does the current increase when the potential differene stays constant?
- xllx
- · Replies 2 ·
Mass of a star given orbital radius and period
- disque
- · Replies 5 ·
What does a negative temperature coefficient of resistance mean?
- xllx
- · Replies 2 ·
Calculating Energy Loss in a Hockey Puck Collision
- hganser
- · Replies 3 ·
Findin acceleration with mass given
- afg_91320
- · Replies 2 ·
Why Are Both X- and Y-Intercepts Equal to 1/f in the Lens' Equation?
- jaejoon89
- · Replies 1 ·
How Many Spectral Lines in the Balmer Series Exceed 400 nm?
- stickplot
- · Replies 4 ·
Need to determine resistance of an object
- Kruum
- · Replies 5 ·
Is the Heat Equation Model for an Insulated Rod Correct?
- dirk_mec1
- · Replies 3 ·
What is the formula for calculating the average stopping force in this scenario?
- physics19
- · Replies 7 ·
How to find the equation of a parabola with the following vertex.
- Cobalt
- · Replies 2 ·
Force Equilibrium: Find T1 Expression w/ m, theta1, theta2, g
- enantiomer1
- · Replies 2 ·
Momentum, kinetic energy, and collisions practice problems
- nivek114
- · Replies 1 ·
Basic optics question - lenses
- jaejoon89
- · Replies 1 ·
Centripetal acceleration of electron orbiting He+ nucleus
- Miss1nik2
- · Replies 1 ·
Pulsar Radius from its rotational period
- TFM
- · Replies 7 ·
Rain from the perspective of a moving train and a gun on the moon
- Matt H
- · Replies 1 ·
Earth and Acceleration due to gravity
- ahrog
- · Replies 9 ·
Adding Vectors: Find Resultant Magnitude of P + S
- leetnerdgirl
- · Replies 2 ·
Specific heat of metal and equilibrium temperature with melting ice
- veronicak5678
- · Replies 2 ·
Why use unit vector for this, and not for that?
- viet_jon
- · Replies 3 ·
Conservation of mechanical energy (low difficulty)
- Oscar Wilde
- · Replies 3 ·
Capacitor charged to 15 V then connected to uncharged capacitor
- clickcaptain
- · Replies 4 ·
Power and Energy Problem-nothing too hard
- Oscar Wilde
- · Replies 5 ·
Finding Speed on Slippery Curves: R, Theta, Mu
- vivekfan
- · Replies 5 ·
Rubber balloon in electric field
- phantom113
- · Replies 1 ·
How Do Proton and Alpha-Particle Speeds Affect Their Closest Approach Distance?
- erinec
- · Replies 1 ·
Asymmetric initial velocity calculation
- jemerlia
- · Replies 1 ·
Distance from Earth where Moon's gravity balances Earth's gravity
- fishinbro321
- · Replies 7 ·
Electric Potential (Potential Energy)
- erinec
- · Replies 8 ·
What is the Orbital Velocity of an Electron in a Hydrogen Atom?
- stickplot
- · Replies 18 ·
Finding theta angle.should be easy one.
- viet_jon
- · Replies 2 ·
What is the tension equation for masses connected by a cord?
- Caitlin Galla
- · Replies 10 ·
Total Energy of Camera Capacitor
- JumpinJohny
- · Replies 2 ·
Electrical potential energy: 3 charges in a line
- alicemunro
- · Replies 1 ·
How Many Pendulum Periods Minimize Time Uncertainty in Gravity Calculations?
- nubey1
- · Replies 1 ·
Electric field and potential from three point charges at triangle corners
- Kudo Shinichi
- · Replies 11 ·
Solving the Plane's Weight and Horizontal Accel.
- vivekfan
- · Replies 1 ·
Calculating Work Done on Cart During Fall?
- TG3
- · Replies 2 ·
Centripetal acceleration in a multi-arm Tilt-a-Whirl prototype
- tomboi03
- · Replies 2 ·
How Deep is the Hole if a Caveman Hears a Rock Hit the Bottom After 16 Seconds?
- Tauskela
- · Replies 16 ·
J"Calculating Work for Charging a Parallel Plate Capacitor
- xswtxoj
- · Replies 3 ·
Spring Constant Calculation for Compressed Spring with Mass
- michlip
- · Replies 6 ·
How to Build a Popsicle Stick Tower to Withstand 100 lbs?
- Oscar Wilde
- · Replies 1 ·
Problems with Newton's Second Law
- TheShehanigan
- · Replies 1 ·
What Is the Reacting Force From the Hinge and Its Angle?
- sinequanon
- · Replies 1 ·
Does sound affect temperature?
- Newton V
- · Replies 13 ·
Several basic resistor prelab questions
- gnarlyskim
- · Replies 1 ·
Find the difference in entropy between a cup of water and a cup of ice
- erin88
- · Replies 1 ·
Conservation of Momentum: Solving a Collision Problem
- Cheesy74
- · Replies 1 ·
How Does Moment of Inertia Affect Fan Deceleration When Ignoring Friction?
- kenlai
- · Replies 1 ·
Find x coordinate where electric field is zero between two charges
- idk11
- · Replies 1 ·
Center of mass of an 8 kg stone on a 98 cm stick
- tascja
- · Replies 1 ·
Static/kinematic friction trouble
- afg_91320
- · Replies 7 ·
Force of friction on two blocks
- afg_91320
- · Replies 2 ·
Simple Harmonic Motion- From Uniform Circular Motion
- chantalprince
- · Replies 5 ·
Designing a newspaper boat for pool racing
- stanford1463
- · Replies 1 ·
Calculating a value of force using vectors?
- xllx
- · Replies 2 ·
Conceptual questions about projectile motion
- vivekfan
- · Replies 2 ·
Solve Energy & Momentum Problem: Urgent Homework
- nns91
- · Replies 1 ·
Suspended Painting: Finding Its Weight
- ignacioserra
- · Replies 3 ·
Vectors help? How do I find a constant of this vector?
- xllx
- · Replies 3 ·
Should ρ, c, and k Be Included in the Heat Equation Solution?
- dirk_mec1
- · Replies 4 ·
A ball, thrown at a 39 degree angle, Intial X and Y velocity not given
- MRGE
- · Replies 4 ·
What is the Electric Field Inside and Outside a Charged Conducting Hollow Tube?
- jimbo71
- · Replies 1 ·
Potential inside a grounded spherical conducting shell due to point dipole
- JayKo
- · Replies 23 ·
Finding clockwise and counterclockwise torques on a balanced rod
- steveo0
- · Replies 5 ·
What is the effect on water temperature when pasta is added to boiling water?
- pentazoid
- · Replies 3 ·
Destructive Interference of Light in 165nm Bubble Film
- stickplot
- · Replies 1 ·
What is the is the rise in temperature of the rock
- Sheldinoh
- · Replies 5 ·
This is a problem on electric current
- heavenaintclo
- · Replies 1 ·
How Do You Calculate Uncertainty in the Volume of a Cylinder?
- Necrosity
- · Replies 1 ·
Solve Currents in I3, I2, and I1
- itryphysics
- · Replies 1 ·
Derived values not satisfying equations.
- dE_logics
- · Replies 5 ·
Work Energy Theorem and Circular Motion
- Ilsem
- · Replies 2 ·
Stopping a Box of Unknown Mass on Frictionless Floor
- TG3
- · Replies 3 ·
Electric field at center of semi-circular bent rod of charge
- caesius
- · Replies 2 ·
How to Calculate Average Velocity and Speed?
- Immy2000
- · Replies 6 ·
How Do You Calculate the Capacitance of a Charged Capacitor?
- xswtxoj
- · Replies 3 ·
Magnitude of a Force on a hatch in a Vessel.
- Basch
- · Replies 2 ·
Engineering problem (acceleration of ions)
- catalina
- · Replies 1 ·
Thin rods (H) rotating about an axis
- deadpenguins
- · Replies 1 ·