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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Total energy of hydrogen at ground state
- songoku
- · Replies 11 ·
Find Number of Nitrogen Molecules with Specific Kinetic Energies
- Gauss
- · Replies 17 ·
Spring characteristics when loaded with a mass
- Jeviah
- · Replies 4 ·
Are tangent lines from rotating ice skaters parallel?
- brotherbobby
- · Replies 7 ·
Amplitude relation with periodic time
- SakuRERE
- · Replies 3 ·
Finding the harmonic motion equation from initial conditions
- Taylan
- · Replies 3 ·
Finding maximum height when initial velocity is unknown
- Christian Despo
- · Replies 9 ·
Solving Charge Across Plates of a Capacitor w/ Negative Ions
- iVenky
- · Replies 2 ·
Cylindrical coordinates: unit vectors and time derivatives
- Mason Smith
- · Replies 3 ·
Problem 9.2 Classical Mechanics: Astronaut in a rotating space station
- SebastianRM
- · Replies 1 ·
Calculating the work done using a line integral
- Burhan Uddin
- · Replies 6 ·
Flux Through a Cube's Face with our Point Charge at a Corner
- Lost1ne
- · Replies 6 ·
Showing that the P(r) is maximum at r=a_0/Z
- Mason Smith
- · Replies 3 ·
Ratio of potassium atoms to calcium atoms in 1 hour
- moenste
- · Replies 11 ·
Volume expansion and sea level rise
- hnnhcmmngs
- · Replies 6 ·
Sound Wave Problem -- time of flight in air versus in water
- Selfless_Gene
- · Replies 13 ·
Swinging Ball at Top of Circle: Forces & Energies
- sarah adam
- · Replies 16 ·
How do you know when k in Hooke's law is positive or negativ
- Derek Marusarz
- · Replies 2 ·
What Is the Ratio of the New Separation Distance to the Initial Separation?
- WhiteWolf98
- · Replies 6 ·
What Is the Electric Field of a Curved Rod at the Origin?
- Zack K
- · Replies 9 ·
Average of two measured forces with significant figures
- jeehoo
- · Replies 1 ·
Mass of Ice required to achieve a certain final Temperature
- CrosisBH
- · Replies 3 ·
Wavelength of light in a dielectric material
- laurieke
- · Replies 8 ·
Why Do Different Methods Yield Different Efficiencies in a Reversible Cycle?
- L0r3n20
- · Replies 2 ·
Why does measuring angle from horizontal vs vertical change the Lagrangian result?
- Abhishek11235
- · Replies 9 ·
Electric field at a point problem
- shadowdn
- · Replies 1 ·
Ideal speed given radius and angle
- Mariesa Yeoman
- · Replies 4 ·
Calculate the gravitational force exerted on a 5.00 kg baby
- Mariesa Yeoman
- · Replies 2 ·
What would be a real-life example of the ideal gas law?
- Lolaamaigatti04
- · Replies 3 ·
Is this work-energy theorem for a system correct?
- Arthur Smyth
- · Replies 12 ·
How Far Has Earth Traveled Since Its Birth?
- Mariesa Yeoman
- · Replies 5 ·
Solve for x(t) and v(t) given a Force equation using Mathematica
- zeesyk
- · Replies 2 ·
Problem when calculating the center of mass of a triangle
- Kampret
- · Replies 5 ·
Calculating Centripetal Acceleration for a Spinning Fairgrounds Ride
- Mariesa Yeoman
- · Replies 2 ·
Calculating Distance Traveled by Semi-Trailer Truck Odometer
- Mariesa Yeoman
- · Replies 4 ·
What is the Power Output of Gravity?
- Kyle Wies
- · Replies 6 ·
Calculate rest mass given relative speed and kinetic energy?
- bai_mi
- · Replies 7 ·
Calculating Safe Distance for Warning: Flower Pot Falling from 21.6m Height
- jybe
- · Replies 8 ·
About linear and angular momentum
- Apashanka
- · Replies 12 ·
Intro to Electromagnetism: five conceptual questions
- EMJ
- · Replies 3 ·
Heating Effect of Electric Current-Transmit at High Voltage
- Cecilia B
- · Replies 5 ·
Change in the Electric Field Due to a Copper Wire Being Inserted
- Zack K
- · Replies 14 ·
Finding the 10 lowest energy levels
- Mason Smith
- · Replies 4 ·
Finding the expression for the x-component of velocity (vectors?)
- ashhlyn
- · Replies 2 ·
Coulomb's Law and 4 point charges
- John Ker
- · Replies 12 ·
Flight Path Angle and Velocity During Atmospheric Re-entry
- AdrianGriff
- · Replies 13 ·
Heat needed to expand a circular metal plate
- songoku
- · Replies 2 ·
What formula would i use this for this HW problem? (Aircraft carrier jet launch)
- Young Bull
- · Replies 3 ·
Centipede inertial frame problem
- Adam564
- · Replies 23 ·
Two people accelerating toward each other 48m apart
- ThatGuyNick
- · Replies 5 ·
Why does a higher density slow down sound in air?
- dragon-kazooie
- · Replies 4 ·
How to determine if the space ship is moving or stopped?
- songoku
- · Replies 5 ·
Tone produced in a partially filled bottle
- songoku
- · Replies 2 ·
Rowing straight across a 63-meter river with current
- opus
- · Replies 11 ·
Siphon pressure and velocity problem
- angelala
- · Replies 12 ·
Final speed of 1100 kg car through 18m of mud with 17000 N resistance
- Caleb S
- · Replies 14 ·
EMF induced in rotating rod inside uniform magnetic field
- songoku
- · Replies 6 ·
Determine the value of the voltage source Vx
- Castello
- · Replies 15 ·
Fizeau's Experiment (Speed of light)
- TachyonLord
- · Replies 6 ·
Conceptual problem in average/instantaneous velocity
- subhradeep mahata
- · Replies 4 ·
Why does a ball take equal time going up and down?
- opus
- · Replies 10 ·
Projectile launched from an inclined plane strikes a wall horizontally
- subhradeep mahata
- · Replies 7 ·
How Do You Calculate Work When Compressing Gas?
- jybe
- · Replies 1 ·
Angular Velocity Problem — a Piston and a Crank
- JohnnyS
- · Replies 12 ·
Finding z component of a unit vector
- Jonathan Lawler
- · Replies 2 ·
Heat input for a device with 20 kW work output and 50 kW heat rejection
- physicshelppls
- · Replies 17 ·
Calculate the change in mechanical energy during collision
- berrytea
- · Replies 16 ·
Why Does Gravitational Potential Energy Seem Absent in Magnetic Field Motion?
- Leo Consoli
- · Replies 26 ·
Calculate velocity of stopping car
- Lizi
- · Replies 7 ·
Rod sliding on perpendicular rails: why is my velocity triangle method wrong?
- subhradeep mahata
- · Replies 7 ·
Bird flying back and forth between two approaching trains
- opus
- · Replies 20 ·
Electromagnetism and magnetic stuff
- CAT 2
- · Replies 7 ·
Electrostatic self-force is zero
- Kaan99
- · Replies 1 ·
Rate of emission of alpha particle in uranium decay
- songoku
- · Replies 2 ·
Rocket equation without infinite small variables
- Germy
- · Replies 6 ·
Coriolis force and the Earth's rotation
- Eitan Levy
- · Replies 18 ·
How to calculate vertical electron deflection between two charged plates?
- Molly
- · Replies 1 ·
Describing the Motion of a String at the Antinodes
- thatguy4000
- · Replies 12 ·
Discrepancy regarding a thermodynamics question
- Apashanka
- · Replies 11 ·
Cyclist on figure-eight loop with circular and straight sections
- Qwertz0099
- · Replies 2 ·
Photon Energy for Muon Pair Production and Electron Wavelength Calculation
- mk9898
- · Replies 2 ·
How Do You Calculate the Ratio h/R for a Spinning Billiard Ball?
- AFlyingKiwi
- · Replies 3 ·
Maximizing final kinetic energy with n intermediate masses in elastic collisions
- titansarus
- · Replies 3 ·
Shell in a cylindrical capacitor
- fcoulomb
- · Replies 1 ·
Dipole and a conducting grounded plane
- gnegnegne
- · Replies 8 ·
Why is the velocity of a jump on Mars the same as on Earth?
- HAF
- · Replies 6 ·
Variable induced surface charge density on a sphere
- Apashanka
- · Replies 9 ·
What is the net force on the -1nC charge in this Coulomb's Law problem?
- Lilian Chan
- · Replies 1 ·
Energy dissipated in the resistors in a 2 mesh RC circuit
- Eduardo Leon
- · Replies 1 ·
Sound Wave Interference Problem
- Ghost Repeater
- · Replies 5 ·
A ball (sphere) rotating along a moving incline
- titansarus
- · Replies 14 ·
Determining the flow rate for a cooling system
- David0709
- · Replies 1 ·
Approximating the force on a dipole Taylor series
- Zack K
- · Replies 3 ·
Steel ring fitting onto aluminum rod through thermal expansion
- queennicolee
- · Replies 1 ·
Statics problem (moment and equilibrium)
- bardia sepehrnia
- · Replies 6 ·
How does the dielectric affect the charge distribution on a charged sphere?
- Apashanka
- · Replies 1 ·
Form Factor for Scattering (like muons off of protons)
- Martin89
- · Replies 3 ·
Gravitational force between two astronauts at distance from Earth
- sp3sp2sp
- · Replies 9 ·