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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Calculating the Efficiency of a Transformer for a Small Appliance
- bleedblue1234
- · Replies 1 ·
How to Calculate the Amplitude of a Resultant Electromagnetic Wave?
- thereddevils
- · Replies 3 ·
How do you estimate the quality factor Q of a tuning fork?
- bon
- · Replies 1 ·
Finding time for constant acceleration over 28.96 km
- attriola
- · Replies 11 ·
Calculate the tension of the blocks
- allora_97
- · Replies 1 ·
Acceleration of gravity problem
- allora_97
- · Replies 2 ·
Work done by force with given component vectors
- yang09
- · Replies 3 ·
Distance Question: 11kg Block Sliding Down 24° Frictionless Slope
- allora_97
- · Replies 5 ·
How to Calculate Uncertainty for Electrical Fields?
- jmatthews1991
- · Replies 4 ·
What Does the Negative Sign Indicate in the Mo Formula on HyperPhysics?
- Audaciity
- · Replies 2 ·
How Does an Elevator's Acceleration Affect the Forces Exerted on a Package?
- luysion
- · Replies 4 ·
SHM of Mass Oscillating between Two Identical Springs
- SpringPhysics
- · Replies 4 ·
Box of nails sliding down a 23° roof with friction
- mullets1200
- · Replies 1 ·
How Do You Calculate the Spring Constant with Kinetic Friction Involved?
- fender5791
- · Replies 1 ·
What is the distribution of forces on a swimming pool springboard?
- bobby2000
- · Replies 3 ·
Apparent mass (specific gravity)
- knowak87
- · Replies 1 ·
Deriving Equation: S=W-W2/W-W1=M/M1-M2
- knowak87
- · Replies 1 ·
Parallel Capacitors and Voltage Distribution
- Zywo
- · Replies 1 ·
Calculating Work Done by a Variable Applied Force
- MissPenguins
- · Replies 4 ·
How High Was the Ball Thrown From the Building?
- GlobalDuty
- · Replies 3 ·
How Many Air Molecules Did Sir Isaac Newton Breathe in His Lifetime?
- decibel
- · Replies 10 ·
Calculating diamter of wire that will blow if current exceeds 1A
- Linus Pauling
- · Replies 2 ·
How do I find velocity from acceleration?
- dyslexiateech
- · Replies 1 ·
How Do You Calculate the Diameter of Plates in a Parallel Plate Capacitor?
- tomfrom77
- · Replies 1 ·
How Do Two Boxes with Different Friction Slide Down the Same Ramp Together?
- ChrisMC
- · Replies 7 ·
Intensity at axis point for circular aperture diffraction at 180 cm
- groosagi
- · Replies 1 ·
Power dissipation in resistive circuit
- csimon1
- · Replies 6 ·
Buoyancy force on a 20cm iron cube submerged in water
- lbella026
- · Replies 2 ·
Find Force to Submerge Ball: 900 kg/m^3, 0.03 m^3
- lbella026
- · Replies 1 ·
When Will Two Objects With Different Speeds and Accelerations Meet?
- sese
- · Replies 1 ·
What is the potential difference between points a and b?
- shimizua
- · Replies 3 ·
Brake System (Torque and Friction)
- zewei1988
- · Replies 6 ·
How Does Removing Bulb C Affect the Brightness of Bulbs A and B?
- JJBladester
- · Replies 14 ·
Calculating Thermal Power Produced by Friction for a Sliding Rock
- Thesnail
- · Replies 9 ·
Plotting horizontal displacement against launch angle
- lukus09
- · Replies 11 ·
Calculating percent error in a lab
- wiccabean21
- · Replies 1 ·
Area Moment of inertia of a circular wire
- i_m_sadiq
- · Replies 1 ·
Expressions for the group velocity
- bon
- · Replies 1 ·
Resistance between ball and bowl
- Piglet1024
- · Replies 1 ·
Why should I use conservation of energy?
- zewei1988
- · Replies 3 ·
Finding work and temperature change for ideal gas expansion
- SAT2400
- · Replies 3 ·
Force to cover distance with drag calculation
- gbaygon
- · Replies 6 ·
Square Plate Parallel, with angle, Capacitance Problem
- sdhick
- · Replies 1 ·
Can Electrons Leave a Circuit Through an Open Branch?
- PhysicsMark
- · Replies 3 ·
Not sure what the initial temperature is
- Gemy4
- · Replies 4 ·
Linear momentum and energy problem
- cero39
- · Replies 6 ·
How Does Current Divide in a Circuit with Multiple Resistors and Batteries?
- henryg09
- · Replies 1 ·
Spinning ball bounces off ground, following curved trajectory
- azure kitsune
- · Replies 3 ·
Impulse and momentum of a golf ball
- jskim092
- · Replies 1 ·
Force Pushing a Block on a Rough Surface
- mecablaze
- · Replies 1 ·
Heat Transfer and Temperature Equilibrium in a Mixed Substance System
- balllla
- · Replies 5 ·
Phys book on level of Halliday in style of Spivak
- sl.124
- · Replies 1 ·
Three body, equal mass star system
- Sarial
- · Replies 2 ·
Conducting Spheres in Electrostatic Equilibrium
- the-alchemist
- · Replies 1 ·
Electric Potential Energy Question - Distance Between Charges and Ratio?
- GymBobClan
- · Replies 2 ·
Atwood Machine: Reduce Exp Errors By Stabilizing Masses
- wiccabean21
- · Replies 3 ·
How to solve for power in a piano wire wave problem?
- DGalt
- · Replies 5 ·
How Can a Grasshopper Jump 1 Meter Starting from Rest?
- Who,me?
- · Replies 3 ·
Electric Field due to Capacitor Plates
- Keano16
- · Replies 1 ·
Hydrogen gas bombarded by electrons
- lockedup
- · Replies 11 ·
How Do You Calculate Forces in a Pin-Jointed Truss?
- iviv
- · Replies 7 ·
Can a hypothesis be partially verified?
- Procrastinate
- · Replies 2 ·
Mean free path of electron in gas.
- lacunae
- · Replies 1 ·
What Causes Tension Changes in a Vertical Circle Motion?
- matthayzon89
- · Replies 1 ·
De Broglie wavelength of an electron
- Oijl
- · Replies 1 ·
What Range of Hanging Mass Keeps the Block Stationary on an Incline?
- mty28
- · Replies 1 ·
Relativistic Stick: Can the Hole Contract Enough?
- boardbox
- · Replies 1 ·
Magnetic Field of rectangular current loop
- cconfused
- · Replies 8 ·
Projectile: Find range, given two displacement points
- rosemetal17
- · Replies 1 ·
Finding average force from impulse and collision time
- noname1
- · Replies 26 ·
Solving Three Charges: Find Force on Q2
- jmatthews1991
- · Replies 5 ·
How Does a Spider Affect the Angular Speed of a Turntable?
- Belladonna
- · Replies 1 ·
What Is Jack's Initial Velocity When He Fell?
- SoConfused__
- · Replies 3 ·
Angular Motion - calculating rad.s and rev.min
- fionahanson
- · Replies 1 ·
How can I calculate projectile distance with limited information?
- lukus09
- · Replies 1 ·
What Is the Current in a Nichrome Tube Connected to a 4V Battery?
- Kittlinljd
- · Replies 8 ·
Conservation of energy problems on different planets
- mr.coon
- · Replies 2 ·
Galilean Invariance: Determining Invariant Quantities in Newtonian Mechanics
- joriarty
- · Replies 1 ·
Square loop of wire surrounding a solenoid
- gobananas1441
- · Replies 1 ·
What is the kinetic energy of the proton?
- Millimole
- · Replies 1 ·
Finding launch angle for projectile with elevated launch height
- rajesh.msen
- · Replies 3 ·
How Is XOR Implemented Using Only NAND Gates?
- Lomion
- · Replies 4 ·
What is the minimum current required to drive a magnet plunger in a micro pump?
- muxtih
- · Replies 2 ·
Velocity of standing waves and boundary conditions on a string
- joe:)
- · Replies 5 ·
What is the Surface Charge Density for a Spherical Cavity?
- Clancy
- · Replies 2 ·
Newtonian Mechanics: Falling Parachutist Problem
- bobey
- · Replies 2 ·
Truck vs Tree (first week physics woes)
- youagain
- · Replies 6 ·
What is the Coefficient of Friction for a Pulley System on an Incline?
- funnylord
- · Replies 2 ·
Projectile motion using conservation of energy problem
- amaryllia
- · Replies 1 ·
Conservation of angular momentum / finding change in rotational kinetic energy
- ezperkins
- · Replies 11 ·
How Do You Solve the Tension Problem in a Multi-Mass System?
- allora_97
- · Replies 2 ·
Linear momentum change of bouncing cue ball at 30°
- noname1
- · Replies 2 ·
Static equilibrium, diving board
- BikeSmoth
- · Replies 1 ·
Projectile motion of a rolling ball
- lolimcool
- · Replies 1 ·
Find and calculate current in a circuit
- choco_moo
- · Replies 4 ·
Effective Resistance of an Infinitely Long Ladder of Resistors
- malindenmoyer
- · Replies 6 ·
Two loudspeakers at (2m, 0) and (−2m, 0) with 15m wavelength
- alireza83
- · Replies 1 ·
Calculating Impulse on a Baseball Colliding with a Bat: Magnitude and Duration
- noname1
- · Replies 7 ·
Charge on pendulum due to electric field
- wendo
- · Replies 13 ·