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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Biceps force needed to counteract 200 N load at 0.3 m from elbow
- mwoods18
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Kibble problem (linear motion chap. 2)
- levilevi
- · Replies 5 ·
Magnetic field at midpoint between opposite-current parallel wires
- SamTsui86
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Spring Constant given mass, and equivalent mass in free fall from fixed height.
- wzx7410
- · Replies 3 ·
Speed and Speed of Light and Decay
- ihearyourecho
- · Replies 16 ·
Understanding Current Flow in Parallel Circuits with Inductors and Resistors
- semc
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What is the Magnitude of the Force on a Block on a Horizontal Surface?
- nmegabyte
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Does a falling rock's momentum increase contradict conservation of momentum?
- Ahalp
- · Replies 2 ·
Thermodynamics: Calculating Outside Temperature of a Greenhouse with Heat Loss
- pinnacleprouk
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Solving Hooke's Law Problem: Find Delta l
- lorik
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Finding the Other Force on a Moving Particle
- nmegabyte
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Current needed through solenoid to produce given B field
- Linus Pauling
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How much heat is added to the gas when it is compressed suddenly?
- Zorba
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Finding density of object and oil from weighing in water and oil
- Leo34005
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How to Calculate Heat Loss in a Freezer Door Handle
- Hendon100
- · Replies 4 ·
Fluids Physics Question: Calculating Density and Pressure of a Physics Book"
- Leo34005
- · Replies 3 ·
Average power during Reginald Esuke's 62.25 minute mountain descent
- bamfazoid
- · Replies 6 ·
Voltage/Circuits Statements False?
- A_lilah
- · Replies 3 ·
How Close Must You Stand to Not Hear Sound from Two Separated Speakers?
- bio.student24
- · Replies 13 ·
Critical angle for total internal reflection with n1=1.3, n2=1.6
- Tekee
- · Replies 7 ·
What Is the Coefficient of Friction for a Toboggan with Added Weight?
- xdeanna
- · Replies 2 ·
Force between two long parallel conductors
- logearav
- · Replies 2 ·
Atwood's fall machine w. sylinder (again?)
- center o bass
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Compare the distribution of electric charge on the two rods
- lauralovesyou
- · Replies 1 ·
Wavelength^2 vs. Tension (graph/conceptual)
- anti404
- · Replies 5 ·
Speed/dist./time problem (need to find average speed)
- bigmac
- · Replies 4 ·
Understanding Frequency in Open and Closed Organ Pipes
- noname1
- · Replies 1 ·
Electricity-sweater physisc problem
- lauralovesyou
- · Replies 1 ·
What is the correct way to apply Kirchhoff's rules to this circuit?
- kliker
- · Replies 1 ·
Electric field at a point within an infinite volume charge distribution
- Villhelm
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How Do You Calculate Maximum Acceleration of a Simple Harmonic Oscillator?
- Bearbull24.5
- · Replies 2 ·
Angular Simple Harmonic Motion of Wheel
- Cherrybawls
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How to find planks constant from a given graph?
- phys02
- · Replies 2 ·
Distance travelled by wave at whichamplitude decreases
- indie452
- · Replies 1 ·
How do frequency, wavelength and period relate to wave motion?
- jwang023
- · Replies 3 ·
Distance of alpha particle to gold nucleus
- Linus Pauling
- · Replies 1 ·
Magnetic field between two wires (vector sums)
- quantum13
- · Replies 2 ·
How Is Angular Resolution Used to Determine the Distance Between Two Stars?
- danmend
- · Replies 1 ·
Coil length or Solenoid length?
- kaosAD
- · Replies 1 ·
Why do velocities need to be the same for maximum spring compression?
- gaobo9109
- · Replies 6 ·
Final Velocity Calculation for a Struck Ball
- Procrastinate
- · Replies 1 ·
Does Heating Affect Molecular Vibrational Frequencies?
- Benzeen
- · Replies 1 ·
Local Sidereal Time of Observation.
- ~Sam~
- · Replies 1 ·
How Does Relativity Explain Shorter Travel Times at High Speeds?
- SAT2400
- · Replies 9 ·
Projectile Launcher, large current, closed loop, magnetic field
- thermocleanse
- · Replies 1 ·
Light Polarization at the Beach: Understanding Sunbathers' Vision
- reising1
- · Replies 1 ·
You are looking up from underwater in a swimming pool radius of circle?
- ReMa
- · Replies 3 ·
Center of momentum for particle collision
- quietrain
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Deceleration Vs time and distance
- nogsta
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What is the integral of a thin rod's electric field?
- frostking
- · Replies 1 ·
Deriving the bright fringe formula in double slit optics
- Puchinita5
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Solenoid Passing through square coil-Finding electric field
- sweetdion
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Stopping a potter's wheel with a wet rag (angular momentum and friction)
- Number47
- · Replies 1 ·
The electric field inside a shell with a charge at the center?
- wil3
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Power dissipated in circuit when voltage/current out of phase
- Revvi
- · Replies 1 ·
Bucket on a spool falls into a well (angular velocity)
- Number47
- · Replies 1 ·
Bullet fired at a Hinged door (rotational velocity problem)
- Number47
- · Replies 5 ·
Kinetic energy of an ionized electron
- Linus Pauling
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Why Do Electrons Move in Spiral Trajectories Within a Magnetic Field?
- S. Hardt
- · Replies 2 ·
Find Angle of Two Forces in 2D Motion
- mode656
- · Replies 4 ·
Calculating Properties of a Transverse Wave on a Rope
- lordrrr
- · Replies 2 ·
Size of Force between two Point Charges
- ZedCar
- · Replies 2 ·
Superposition principle(circuits)
- kliker
- · Replies 8 ·
Wavelength of a laser exciting H atom from n =2 to n = 5
- Linus Pauling
- · Replies 1 ·
How to Create a Bisection Method Program for Arbitrary Functions?
- rantz
- · Replies 7 ·
Numerator of Lorentz velocity transformation for v_x = u
- malindenmoyer
- · Replies 5 ·
Is it possible that either A or B can be true after a collision?
- MCATPhys
- · Replies 7 ·
Calculating Driving Force on a Conveyor Belt with Baggage Load?
- gaobo9109
- · Replies 1 ·
A car experiences uniform acceleration
- Cris911
- · Replies 4 ·
Velocity of jack-o-lantern in 2D projectile motion
- BrianPagliaci
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Solving for Error in Y: A Math Problem
- lemon
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What is the electric potential at the center of the semicircle?
- physnoob
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How can the boy's weight and position on a beam affect its equilibrium?
- Cfem
- · Replies 5 ·
How much energy is released in a matter-antimatter annihilation event?
- abohn1
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Potential due to electric dipole
- indie452
- · Replies 9 ·
What is the mass of water ejected per unit time from the nozzle in a toy rocket?
- gaobo9109
- · Replies 1 ·
Is the Internal Resistance of the Voltmeter Accurate in Series Circuit?
- kliker
- · Replies 3 ·
Fluids Archimedes principle apparent weight question
- sachin123
- · Replies 3 ·
Time dilation problem: rocket to star 5 light years away
- NUFC
- · Replies 9 ·
Maximum travelling distance of car from 1 L of fuel
- shannon.leigh
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Calculating Magnitude of Vector Product of Two Vectors
- dmsgo89
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Parallel Sheets and Electric Fields
- prototech
- · Replies 3 ·
RLC Circuit- Find average power in circuit
- yankeekd25
- · Replies 2 ·
What Is the Correct Formula for Calculating Average Power in an AC Circuit?
- Tekee
- · Replies 1 ·
What is the Coefficient of Friction Between a Book and the Floor?
- mode656
- · Replies 4 ·
Relativistic velocity of probe with four reference frames
- ihearyourecho
- · Replies 2 ·
Work Done by T1 and T2 in Lowering a Piano
- ChrisMC
- · Replies 13 ·
What is the final speed of the block before it hits the ground in each case?
- ChrisMC
- · Replies 3 ·
Thermal expansion, sound level, heat conduction, and Doppler effect problems
- ReMa
- · Replies 2 ·
How Cars Accelerate - A Physics Explanation
- DV10
- · Replies 1 ·
Heisenberg uncertainty principle for a moving ball
- asl3589
- · Replies 3 ·
Finding maximum force from a particle's changing velocity
- ChrisMC
- · Replies 3 ·
Calculating uncertainty in a problem?
- bio.student24
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Asteroid impact speed and change in Earth's day length
- karobins
- · Replies 10 ·
Potential difference and a conductor
- snshusat161
- · Replies 15 ·
Answer Age of Rock: 1.7*10^9 Years
- triac
- · Replies 2 ·
Kinetic Energies of Particles in Nuclear Decay
- lifeiseasy
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What is the rate of heat loss through an insulated wall with glass wool?
- kboykb
- · Replies 2 ·
Conservation of energy of three spring system.
- bobred
- · Replies 1 ·