Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Threads
Telescope in Milikan Experiment
- shehri
- · Replies 1 ·
RC Circuit Problem: Find I1, I2, I3 and Q
- SamTsui86
- · Replies 1 ·
Solving for the Potential Energy of a Uniform Rod Attached to an Elastic String
- mr bob
- · Replies 4 ·
Writing x and y equations as a vector using unit vectors i and j
- silent bob
- · Replies 1 ·
What Is the Maximum Electrical Force Between Two Protons in a Cyclotron?
- stylez03
- · Replies 15 ·
Converting Acceleration to Velocity
- Thrawn
- · Replies 9 ·
2 Forces problems (Halliday/Resnick/Walker, 7th Ed. book)
- luvsk8ing
- · Replies 2 ·
Cant someone start a tutorial thread?
- sidrox
- · Replies 5 ·
Momentum problem with collision
- lzh
- · Replies 33 ·
Using Cross Products To Find Electric Field Vector
- kmj9k
- · Replies 4 ·
Power Density of Solar Cell Question
- T-Man78
- · Replies 1 ·
Minimum friction for a banked curve at slower speed
- blueray4
- · Replies 7 ·
Calculating Impact Velocity on an Incline: Solving for Coefficient of Friction
- blueray4
- · Replies 10 ·
Spring scale pointer position and unknown weight
- helppleaseee
- · Replies 4 ·
Force on disc: angular velocity after 3 rotations
- iamtrojan3
- · Replies 1 ·
Force of car pushing truck with 4500 N wheel force
- Nero25
- · Replies 1 ·
Photoelectric Effect: Calculating Electron Energy
- xiankai
- · Replies 4 ·
Has the current through battery 1 changed?
- cy19861126
- · Replies 3 ·
Find the Speed of Carts After Exploding Spring
- robin97531
- · Replies 4 ·
Using Kirchoff's Laws to solve a circuit
- lylos
- · Replies 3 ·
How Does Distance Affect the Work Done by an External Agent on a Charge?
- cy19861126
- · Replies 2 ·
Need verify on a momment of inertia/torque problem
- iamtrojan3
- · Replies 1 ·
How High Must a Toy Car Start to Complete a Frictionless Loop?
- xXmarkXx
- · Replies 23 ·
Breakdown Potential in a cylinder
- cd80187
- · Replies 4 ·
Mathematical model for bullet deflection in armor
- David W
- · Replies 1 ·
Window washer pulling with pulley at constant speed and with 9% force increase
- chazgurl4life
- · Replies 11 ·
What is the Electric Field at the Origin Due to Two Point Charges on the Y-Axis?
- jwl322
- · Replies 5 ·
How to determine the brightness of a light bulb
- cy19861126
- · Replies 2 ·
Partition Function of 2 State System
- HalfManHalfAmazing
- · Replies 1 ·
Solving for Velocity in a Bead's Circular Motion
- Crater
- · Replies 1 ·
Charged particle moving through parallel plates and magnetic field
- twotaileddemon
- · Replies 4 ·
Electric potential difference for test charge between two negative rods
- cy19861126
- · Replies 7 ·
How Long Does It Take for Ice to Double Its Thickness in Sub-Zero Temperatures?
- NASSAfellow
- · Replies 27 ·
Is the Water Pressure Inside a Cup Equal to 14.7 psi Due to Atmospheric Force?
- Idea04
- · Replies 8 ·
Bug sliding in an 11 cm bowl with friction on the bottom
- xXmarkXx
- · Replies 15 ·
Why Is the Experimental R_eq Value Higher Than Theoretical?
- Soaring Crane
- · Replies 2 ·
How Is the Potential Calculated at the Center of a Charged Copper Sphere?
- stylez03
- · Replies 14 ·
Calculating Potential Difference in a Parallel-Plate Capacitor
- AznBoi
- · Replies 7 ·
Can a Plastic Drinking Glass Handle Over 9000 V as a Capacitor Dielectric?
- cd80187
- · Replies 1 ·
Which way is the current flowing?
- Mesmer
- · Replies 2 ·
How Is Charge Determined from Electric Potential and Distance?
- stylez03
- · Replies 2 ·
Is tension truly horizontal in a swung rubber stopper?
- BayernBlues
- · Replies 2 ·
Heat pumps and coeffiecent of performance
- rmorelan
- · Replies 1 ·
Maximum steepness of a hill for a car to climb without slowing down
- anightlikethis
- · Replies 7 ·
Capacitance and Electrical Energy, Weird Question
- AznBoi
- · Replies 4 ·
Cricket ball / projectile question
- sarahcate
- · Replies 9 ·
Classical radius of an electron and its implications prob.
- Delzac
- · Replies 3 ·
Wave speed on a coil spring and finding frequency from pulses
- pharaoh
- · Replies 5 ·
How Do You Calculate the Angle of the Net Magnetic Force in a Complex Field?
- Crimsonangel
- · Replies 2 ·
What is the maximum speed the car can have to avoid hitting the barrier?
- adamlazz
- · Replies 2 ·
Elevator Problem: 10700 Joules Lifts 3900N by 9 Ropes
- helppleaseee
- · Replies 3 ·
Work to move a proton, alpha particle, electron, and neutron to infinity
- stylez03
- · Replies 3 ·
Print ViewCalculating Flux for Hemispheres of Different Radii
- dark_omen
- · Replies 1 ·
Significant figures when taking measurements.
- opticaltempest
- · Replies 5 ·
What is the effect of motion on the gravitational field of a massive object?
- hover
- · Replies 9 ·
Acceleration due to air resistance?
- evilmigit14
- · Replies 3 ·
What is the Resistance of Resistor X?
- Soaring Crane
- · Replies 1 ·
Understanding Circuits: Calculating Velocity at 25.5 km/h
- pugfug90
- · Replies 4 ·
Why can I push a block and stay with it if we exert equal forces?
- pivoxa15
- · Replies 27 ·
Electric Fields at Points A, B, C, and D: How Do They Compare?
- cy19861126
- · Replies 5 ·
Max # of 90W 120V Light Bulbs on 20A 120V Circuit
- Soaring Crane
- · Replies 1 ·
Weight in Orbit? 0N on Spring Balance at 2.8M Triton Ht
- pivoxa15
- · Replies 12 ·
Determine the tension in each section of rope
- helppleaseee
- · Replies 4 ·
Gravitational potential energy of shuttle between two stars
- kingwinner
- · Replies 17 ·
Are the Resistors in a Parallel Circuit and is 3.50 A the Total Current?
- Soaring Crane
- · Replies 2 ·
Potential energy of three equal charges at triangle corners
- stylez03
- · Replies 40 ·
Rocket mass ratio for 8 km/s final speed with 2100 m/s exhaust
- cycam
- · Replies 9 ·
Velocity of fluid from pressurized tank using Bernoulli's equation
- Robbomb116
- · Replies 1 ·
Calculating Voltage of Cloud After Lightning Bolt Transfer
- AaronLosAl
- · Replies 2 ·
Average velocity with respect to distance
- tony873004
- · Replies 2 ·
Gravity's affect on the rebounce height of a tennis ball
- cluelessmum
- · Replies 2 ·
Why dont birds get electocuted when they are on power lines?
- aquabum619
- · Replies 2 ·
Assuming acceleration is constant
- cipotilla
- · Replies 6 ·
Simple Initial Velocity Problem
- derekfuselier
- · Replies 1 ·
Ratio of tensions in rod segments for rotating spheres
- pivoxa15
- · Replies 9 ·
Finding impulse and momentum in collision problem
- stinlin
- · Replies 1 ·
What is the force exerted by the rope?
- pivoxa15
- · Replies 4 ·
Collision of mass m with mass 2m at rest, m deflected 45°
- help444
- · Replies 4 ·
Collision between mass m and 2m at 45 degree deflection
- help444
- · Replies 3 ·
How Long Does It Take to Move a 0.1kg Object with a Tiny Force?
- Thrawn
- · Replies 3 ·
How to Determine Charge and Excess Electrons in Millikan's Oil Drop Experiment?
- cindy!
- · Replies 3 ·
What is the Terminal Voltage and Current for Various Batteries in a Circuit?
- Soaring Crane
- · Replies 4 ·
How much does the spring compress when an elevator cable breaks?
- Neerolyte
- · Replies 2 ·
Difference between volts and voltage and what signs to use?
- pugfug90
- · Replies 6 ·
Velocity and acceleration from a position equation
- glid02
- · Replies 2 ·
Buoyancy of helium-filled sphere and U-tube with oil
- icg
- · Replies 1 ·
Relative Motion (Swimmer Crossing River Question)
- Aristata
- · Replies 1 ·
Does Flowing Water Trap and Release Air?
- Idea04
- · Replies 4 ·
Electric Field at Point 1 cm Left of Middle Charge (-3.5 µC Force)
- BunDa4Th
- · Replies 11 ·
Phase shift from plastic covering one slit in double-slit experiment
- chipwhisperer
- · Replies 5 ·
How can we accurately calculate work using changing acceleration?
- ssb
- · Replies 8 ·
Factors Affecting Galvanic Cell Voltage
- Negative_proton
- · Replies 5 ·
Rock hanging from ceiling swinging uniform circular motion
- iamtheone
- · Replies 14 ·
How Does Bragg's Law Determine the Angle of Gamma-Ray Deflection?
- MarkusNaslund19
- · Replies 1 ·
Why does potential energy increase when moving +q toward +Q?
- pugfug90
- · Replies 18 ·
Why Do Styrofoam Pieces Dance and Stick on a Charged Plastic Surface?
- billbillington
- · Replies 1 ·
Angular Velocity and static friction
- kitty9035
- · Replies 1 ·
What Time Does a Projectile Make a 30° Angle with the Horizontal?
- danielab87
- · Replies 7 ·
Circular motion of a car and tires
- xtrmk
- · Replies 5 ·