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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Current vs power and voltage in photoelectric effect
- al_201314
- · Replies 9 ·
How Do You Calculate Torque in a Beam Suspended by a Rope?
- mcdelilah
- · Replies 1 ·
How Does Tension Affect Electric Charge Calculation?
- verd
- · Replies 1 ·
Kind of a challenge(for me i guess)
- wicked
- · Replies 18 ·
How great is the friction force?
- uwmphysics
- · Replies 5 ·
What motion does a constant force produce on an object?
- uwmphysics
- · Replies 3 ·
Beaker with water on a weighing scale
- whoelsebutme
- · Replies 4 ·
Question regarding Elastic Potential Energy
- garyljc
- · Replies 3 ·
Acceleration change in freefall
- uwmphysics
- · Replies 18 ·
Struggling to Understand Relativistic Phenomena
- meemosewa
- · Replies 10 ·
Magnetism and Current Carrying wires (?)
- mike412
- · Replies 5 ·
Calculating Velocity and Displacement in a Skateboarding Physics Experiment
- MetalCut
- · Replies 4 ·
Which drop of water has more force to hit ground?
- sleepsleep
- · Replies 2 ·
Why Do Initial and Final Conditions Swap Places in Scientific Fractions?
- physicsgal
- · Replies 1 ·
Directions of velocity and acceleration
- uwmphysics
- · Replies 28 ·
Which Way Will the Ball Swing When You Brake?
- uwmphysics
- · Replies 7 ·
Why is the normal used as a reference for angles in physics and math?
- Aladin
- · Replies 4 ·
Mechanics 3 Elastic Springs and Strings Problems
- garyljc
- · Replies 11 ·
Boiling water - oscillation; when oxygen needs more room
- Mallignamius
- · Replies 5 ·
Radial and Tangential Acceleration of a train
- webren
- · Replies 10 ·
Electric Field Direction at Point z=a for Two Perpendicular Lines of Charge
- Bradracer18
- · Replies 14 ·
Why different objects behave differently with light?
- MalayInd
- · Replies 3 ·
Coaxial pair of infinitely long charged solid conductors
- ness9660
- · Replies 1 ·
Why does heat flow from hot to cold?
- Mallignamius
- · Replies 1 ·
Average force needed for cyclist to climb 1 km hill in 30 minutes
- mms05
- · Replies 7 ·
How Do You Determine Instantaneous Velocity from a Tangent Line?
- webren
- · Replies 4 ·
What Causes Different Acceleration Calculations in Sled Dynamics?
- johndoe3344
- · Replies 1 ·
Violin string frequency when fingered halfway down
- pinal08854
- · Replies 8 ·
Capacitors connected in series.
- ness9660
- · Replies 3 ·
Calculating Speed of Charged Particles in Electric Field: An Example"
- StudentofPhysics
- · Replies 1 ·
How do I calculate voltage and charge through capacitors in series and parallel?
- Bradracer18
- · Replies 5 ·
Net force on charge at center of square with four charges
- sophzilla
- · Replies 5 ·
Do Standing and Traveling Waves Share the Same Period?
- jcais
- · Replies 3 ·
What is the magnitude of the electrostatic force between two point charges?
- therealkellys
- · Replies 3 ·
Is the Echo Frequency Increased When a Dolphin Approaches Fish?
- physicsgal
- · Replies 7 ·
How do white holes violate the second law of thermodynamics?
- PhiJ
- · Replies 2 ·
Reading a strobe diagram of a slowing ball
- uwmphysics
- · Replies 3 ·
What Happens to Capacitance When Voltage Doubles?
- Bradracer18
- · Replies 6 ·
What is the acceleration of objects falling on the moon in a vacuum?
- uwmphysics
- · Replies 2 ·
Angular Dispersion of Visible Light @ 45deg Incidence
- fiyavan
- · Replies 1 ·
Thermal equilibrium with water and ice
- louisfrancois
- · Replies 1 ·
Radioisotopes with the greatest activity?
- danago
- · Replies 8 ·
Car skidding off circular track with 1.70 m/s² tangential acceleration
- vijay123
- · Replies 26 ·
Who does the work in lifting magnetic material with natural magnets?
- Kolahal Bhattacharya
- · Replies 2 ·
What are the methods for solving impulse and momentum problems?
- mikejones2000
- · Replies 3 ·
What Forces are Involved in Newton's Laws of Motion for Two Bodies on a Table?
- Harmony
- · Replies 9 ·
Why is tension T=m(g-a) and not m(g+a)?
- soljaragz
- · Replies 2 ·
Basic Physics Problem: Solving Work with Forces on an Inclined Plane
- gazepdapi1
- · Replies 1 ·
Why Does Friction Allow Different Car Accelerations on Ice and Road?
- MalayInd
- · Replies 11 ·
Sound Intensity and Sound Waves
- pinal08854
- · Replies 5 ·
Electric charge of 1.602 microcoulombs and finding field components from potential
- Bradracer18
- · Replies 14 ·
Electric field and change in Voltage question
- StudentofPhysics
- · Replies 5 ·
Ferris Wheel Physics Problem: Average Speed & Key Launch Angle
- jhrnndz1
- · Replies 20 ·
Are dipoles zero-flux, and can equipotential lines be vectors?
- Bradracer18
- · Replies 8 ·
Relevant sites of roational motion
- vijay123
- · Replies 6 ·
Calculating binding energy for uranium-235
- pavadrin
- · Replies 9 ·
How Many Photons Are Emitted Based on Intensity and Photon Energy?
- Nopollution
- · Replies 1 ·
How Does Rotational Kinetic Energy Affect the Speed of a Trebuchet's Projectile?
- vijay123
- · Replies 11 ·
Understanding Electric Force: Calculating Change in Potential Energy
- soljaragz
- · Replies 2 ·
What is the relationship between work and potential energy?
- soljaragz
- · Replies 8 ·
My gravitons move out at the speed of light
- Arian
- · Replies 4 ·
What is the mass of the lead block suspended from the wooden block?
- MD2000
- · Replies 11 ·
Centre of gravity,centre of charge
- Kolahal Bhattacharya
- · Replies 2 ·
How does gravity grow through acceleration.
- Arian
- · Replies 19 ·
Can thrown paper re-enter a train through a following window?
- laurenselen
- · Replies 3 ·
What Color Does Pure Water Actually Emit?
- Kolahal Bhattacharya
- · Replies 5 ·
What Voltage is Needed for Two Toasters in Series?
- Bradracer18
- · Replies 5 ·
Finding Electric Field and Speed of Electron in a Parallel-Plate Capacitor
- tony873004
- · Replies 15 ·
Neutrality in atoms and hydrogen mass
- boris16
- · Replies 18 ·
What Angle Should a Quarterback Throw to Hit a Stationary Receiver?
- Tensaiga
- · Replies 2 ·
How much of our body is vacuum and other questions
- Lisa!
- · Replies 14 ·
Net force on 3 kg object sliding 0.4 m down an incline in 0.25 s
- binahkitty
- · Replies 4 ·
Relationship between volts and charge
- Jacques
- · Replies 4 ·
How can I find the optimal launch angle for maximum distance?
- hippolyta2078795
- · Replies 11 ·
Calculating Minimum Distance Between Two Power Lines (50 kV)
- jf22901
- · Replies 4 ·
Parallel orientation lower in energy than antiparallel orientation
- asdf1
- · Replies 7 ·
Why is refractive index frequency dependent but static dielectric constant is not?
- Kolahal Bhattacharya
- · Replies 1 ·
Calculating Water in a Tank Over Time
- Idea04
- · Replies 5 ·
Graphing a Hyperbolic Trigonometric Function: Radian vs. Degree Mode
- sophzilla
- · Replies 2 ·
Luminous intensity in different directions
- Amith2006
- · Replies 4 ·
Fired Bullet Formula: Calculate Fallout Height
- Zipher
- · Replies 4 ·
Electromagnetic apply to aerospace.
- kyleblack
- · Replies 2 ·
What Happens to the Voltage When Capacitors Are Connected Together?
- renanpo
- · Replies 3 ·
Boat deceleration distance using v² = v₁² + 2ad
- Erectable
- · Replies 2 ·
Luminous flux from a point source on the ceiling
- Amith2006
- · Replies 6 ·
Torque Req. for Fixed Rot. Acc.
- Beyond Aphelion
- · Replies 1 ·
Newton's second and third law questions Where am I wrong?
- benji
- · Replies 5 ·
How Do Helicopters Fly Using Bernoulli's Principle?
- catriona
- · Replies 5 ·
Can a concave lens form a real image from a convergent beam?
- Amith2006
- · Replies 3 ·
What do activity and biological half-life mean for radioisotopes?
- pavadrin
- · Replies 4 ·
How to Calculate Projectile Direction and Timing to Hit a Moving Target?
- E-Lo
- · Replies 7 ·
Find Distance of Electric Charge 3 from q1: 13.9 cm
- tony873004
- · Replies 3 ·
Why does a positive charge attract a neutral conductor?
- dzza
- · Replies 3 ·
How Do You Calculate Rocket Momentum Changes in Physics Problems?
- Peter5897
- · Replies 5 ·
How Does Projectile Motion Determine Maximum Height and Time to Peak?
- Musicman
- · Replies 7 ·
Calculating Pressure Difference for Indoor Plumbing
- Idea04
- · Replies 7 ·
Solving a Rookie QB's Trajectory Problem
- Musicman
- · Replies 1 ·
AP Physics C Projectile Question
- Musicman
- · Replies 11 ·
Calculating Acceleration and Distance: Entering the Freeway
- Musicman
- · Replies 7 ·
Motorcycle Acceleration: Find Position, Velocity & Max Velocity
- Musicman
- · Replies 16 ·