Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Maxima of Diffraction Grating with 300 Lines/mm and Wavelength of 450 nm
- Viviana
- · Replies 5 ·
Astronomical Lens Telescope Problem - Angular Magnification
- AXidenT
- · Replies 3 ·
Why Does Cramster Simplify Velocity Components Incorrectly in Physics Problems?
- Fellowroot
- · Replies 3 ·
Measuring gravitational force of the Earth
- Ipos Manger
- · Replies 25 ·
Very interesting incline problem
- jakeyboy
- · Replies 1 ·
Calculating the Net Charge Enclosed by a Closed Surface
- MissPenguins
- · Replies 7 ·
Angular momentum and its conservation
- tsopatsopa
- · Replies 1 ·
How can I do a fantastic EEI for Physics?
- FreezeFlow
- · Replies 3 ·
Why Does the Voltage at Point B Measure 30V?
- james11223
- · Replies 3 ·
Graph of frictional force vs angle of inclination
- jontyjashan
- · Replies 2 ·
Amplitude of a reflected wave on a rope fixed to a wall
- Lynden L
- · Replies 1 ·
What Happens to the Electric Field at X=3cm Between Two Protons?
- Lynden L
- · Replies 1 ·
What is Heisenberg's Uncertainty Principle?
- clementc
- · Replies 2 ·
How long does it take to get to the nearest star?
- frostedpoptar
- · Replies 12 ·
Bird's speed relative to person on ground
- maff is tuff
- · Replies 2 ·
Car accelerates from rest over 200m to 80 km/h
- Nickles
- · Replies 8 ·
Where does the energy go when lifting a rope?
- Order
- · Replies 12 ·
Setting up the differential equation for projectile motion
- tomwilliam
- · Replies 3 ·
Dynamics: rogid bodies force and acceleration
- etotheix
- · Replies 3 ·
How Fast Was the Truck Moving Before the Collision?
- twistedcolors
- · Replies 1 ·
Kinetic energy - what is the exact definition
- logearav
- · Replies 6 ·
Calculating Energy of Photoelectrons Ejected from a Magnesium Surface
- euphoriax
- · Replies 2 ·
Mass loses contact with platform at 6.2 cm amplitude in SHM
- andyatk14
- · Replies 3 ·
Dynamics Question on projectile motion
- leonsilavant
- · Replies 1 ·
Projectile Motion - Is my work correct?
- AnomalyCoder
- · Replies 7 ·
How Does a Nuclear Explosion Affect Shock Wave Radius?
- eliassiguenza
- · Replies 1 ·
Physics particle velocity kinematics question
- b-pipe
- · Replies 8 ·
How can I design a physics experiment using a box of matches?
- gurtaj
- · Replies 5 ·
Why is the normal force zero when a box falls freely in an elevator?
- wolves5
- · Replies 2 ·
Finding the time of arrival between two balls in air using kinematics
- garcia1
- · Replies 5 ·
Earthquake Waves: Calculate Distance from Station
- maff is tuff
- · Replies 2 ·
What will happen to the crate of eggs when a truck makes a sharp left turn?
- wolves5
- · Replies 1 ·
Ranking brightness of equal resistors in a circuit with series and parallel paths
- brom123
- · Replies 2 ·
Calculating Acceleration and Tension in a Two-Block System with Friction
- wolves5
- · Replies 3 ·
Find the Kinetic Frictional Force on a 9kg Block on an Incline
- wolves5
- · Replies 1 ·
OUNT OF ENERGY REQUIRED TO LIFT A SATELLITE TO 400 KM ALTITUDE
- obnoxiousris
- · Replies 11 ·
Circular motion, find V when only given m and r
- Eats Dirt
- · Replies 3 ·
What is the Speed Needed for Orbit at Earth's Surface?
- Da Apprentice
- · Replies 7 ·
Reducing Hip Fracture Risk with Elastic Hip Pads: What Acceleration is Needed?
- maff is tuff
- · Replies 4 ·
Why would the spring constant change?
- backtoearth
- · Replies 8 ·
Kinetic and Potential Energy Problem Solving
- Callen9
- · Replies 2 ·
Charges mass on the end of a light string
- MissPenguins
- · Replies 8 ·
How Do You Determine the Direction of a Force?
- james11223
- · Replies 3 ·
Intro Physics distance-to-a-stop
- maff is tuff
- · Replies 4 ·
Intro Physics Distance Travelved Question
- maff is tuff
- · Replies 7 ·
Solar constant and the Earth surface
- pincopallino
- · Replies 7 ·
Maximum weight of AC unit on a 36° roof with 520N friction limit
- maff is tuff
- · Replies 6 ·
Finding the phase constant from a cosine SHM graph
- ubbaken
- · Replies 7 ·
How Do You Solve a Problem Involving Wire and Power Dissipation?
- james11223
- · Replies 7 ·
Find the forces exerted by the floor and the wall at Q and R?
- devvaibhav
- · Replies 4 ·
Car moving at angle from a rock receiving a sound echo
- Lajka
- · Replies 14 ·
Weight component parallel to a hillside at angle alpha
- maff is tuff
- · Replies 5 ·
What are the different methods to calculate vector products?
- draotic
- · Replies 2 ·
Solving for the final velocity of an object thrown off of a Martian Volcano
- garcia1
- · Replies 4 ·
Complex Number Inequalities: Sketching Solutions
- nayfie
- · Replies 5 ·
How High Do Crossing Stones Meet When Thrown from Opposite Ends of a Cliff?
- gtn013
- · Replies 3 ·
Distance to earthquake from wave arrival time difference
- garcia1
- · Replies 8 ·
Calculating dimensions of power
- fran1942
- · Replies 2 ·
Putty wad drops onto rotating rod with two balls
- ledphones
- · Replies 14 ·
Why is binding energy not applicable to proton-electron assembly?
- Darkmisc
- · Replies 3 ·
Finding the instantaneous center of rotation for shaft AC
- Femme_physics
- · Replies 13 ·
Why is the Electric Field 0 Inside a Nonconducting Shell?
- reising1
- · Replies 17 ·
Refrigerator on accelerating truck: normal force, tipping, and rope tension
- ledphones
- · Replies 1 ·
What Is Wrong with My Washer Method Calculation?
- talk2glenn
- · Replies 4 ·
Cannot figure out how these conversion factors came about to this answer?
- j2dabizo
- · Replies 1 ·
Gravitational Force due to Earth, Moon, and Sun
- snb29
- · Replies 2 ·
Finding braking acceleration as a fraction of g for a car stopping from 100 km/h
- garcia1
- · Replies 3 ·
Ball rolling in a hemispherical bowl (model oscillation)
- eon714
- · Replies 5 ·
Max distance to place an object so it won't slide (torque and friction)
- Femme_physics
- · Replies 53 ·
Calculate Mass of Nitrogen in 2.5 atm, 0.2 m3, 300C
- teggenspiller
- · Replies 10 ·
How to Transform a Circuit to One Resistor?
- builder_user
- · Replies 33 ·
Find the ratio (ideal gas laws) how to get a Ratio between two numberS>
- teggenspiller
- · Replies 10 ·
Water falling into bucket, Force question
- Leeoku
- · Replies 5 ·
Self-propelled boat that fires a projectile after 1.0 meter
- dancekevin
- · Replies 2 ·
Power Loss in transmission lines: Which method is correct?
- PaulK
- · Replies 2 ·
Solving Simple Pulley Question: Magnitude of Reaction Force on Pin A
- Dalmighty
- · Replies 2 ·
Question regarding distance traveled by a trebuchet
- permapoop
- · Replies 3 ·
True or false: about Transformers
- PaulK
- · Replies 1 ·
Bullet hitting stationary Target.
- Adarshaero
- · Replies 8 ·
What is the angle between B and C if A.B = 0 and A x C = 0?
- draotic
- · Replies 11 ·
How is the Induced Magnetic Field Inside a Coil Determined?
- mad_monkey_j
- · Replies 24 ·
Calculating Vector Product of A and B
- draotic
- · Replies 8 ·
Why Do Equal Forces on Different Masses Result in the Same Height?
- mrlucky0
- · Replies 4 ·
I just don't understand this Spring - ElectroStatic problem
- flyingpig
- · Replies 24 ·
Using Kinematics to find the Distance of an object dropped from rest
- garcia1
- · Replies 1 ·
Force and Volume Relationship in Fire Hose Operation
- Ipos Manger
- · Replies 9 ·
Find the resistance through a resistor
- Resmo112
- · Replies 43 ·
Particle motion in xy plane with time-dependent velocity
- Jimmy84
- · Replies 5 ·
Torque and angular momentum with ball shot into air
- physicsklutz
- · Replies 4 ·
What is the moment of inertia of a disk with a hole about the Z-axis?
- ledphones
- · Replies 4 ·
What is the Moment of Inertia of a Disk with a Hole?
- ArticMage
- · Replies 2 ·
Solving the Concave Lens Problem for a Hotel Room Peephole
- itsgood819
- · Replies 2 ·
Calculating Wavelength and Understanding Sound Interference in a Room
- fran1942
- · Replies 6 ·
What is the pressure in terms of pi?
- teggenspiller
- · Replies 2 ·
What is the energy equivalent of a proton-antiproton pair?
- dandy9
- · Replies 4 ·
Equivalent resistor of 2011 resistor web
- pincopallino
- · Replies 7 ·
Fishing reel and restraining torque
- ajmCane22
- · Replies 1 ·
Finding Instantaneous UL and iL After Commutation for Transients (LC) Physics
- builder_user
- · Replies 55 ·
Simple harmonic motion and particle speed
- ahhgidaa
- · Replies 10 ·
How to find out the range of a spring?
- andy_loud
- · Replies 1 ·