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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A 50cm wavelength EM wave in air has 50mW/m^2 of energy.
- Physics8o8
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Finding the initial velocity using quadratic
- Rammer24
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A 2cm diameter cylindrical solenoid of 10 loops and 20cm long
- Physics8o8
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Particle Energy on a Smooth Sphere: Finding the Point of Departure
- bernvall
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Deriving the Energy-Momentum Formula
- Rulesby
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Question in thermodynamics-melting of ice.
- hale2bopp
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Induced EMF in Non-Uniform Magnetic Field
- arl146
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Using hookes law to find impulse
- captainhooke1
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Hollow shere energy and velocity
- tebes
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Moment of Inertia of a Small Sphere Revolving on a String
- cc2hende
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Speed of Boy & Image in Plane Mirror: A,B,C Explained
- Faris1985
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Work with drag problem. Blimp being pulled downward.
- gabbiegirl
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Understanding Acceleration and Motion with a Constant Acceleration Formula
- demv18
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What Happens to Gas Temperature in an Isothermal Expansion?
- maurice2705
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Spring motion/Friction/Freefall problem
- jjd101
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Doppler shift of an approaching source with interference problem
- Solidearth
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What is the Angular Speed of a Freely Rotating Cylinder?
- tebes
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Two cylinders rolling without slipping
- smallflight
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Magnitude of vector, negative in part.
- feathermoon
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Minimum separation between pucks
- GingerKhan
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How to Calculate the Inclination Angle of a Plane from Acceleration?
- tarheels88
- · Replies 8 ·
What are the magnitude and direction of the friction force?
- skysunsand
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Circular motion with no frictional force
- lucas1
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What is the largest value of Fw the cords can withstand?
- badhorserides
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What is force if acceleration is .75? (inclined plane)
- skysunsand
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Design a $40 Egg-Protecting Device for the Egg Drop Challenge
- Doominater84
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Specific Heat Capacity of metal in water
- jendrix
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Is it possible to find Vout in this case ?
- Femme_physics
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What Is the Heat Capacity in an Isothermal Process?
- maurice2705
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Given linear density of two strings of total length 4m, find total length.
- chris_avfc
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Calculating Work Done by Air in a Siphon Pump for Water Barrel
- chingel
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Collision with an object after circular motion.
- dttah
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Calculating Density of an Object Based on Submersion Percentage
- deathshero
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Elastic collision with the floor
- dttah
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Calculating Gravitational Force on a Point Mass in the Presence of a Cavity
- maurice2705
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Coefficient of static friction of uniform rod
- maurice2705
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Rain and man problem. (relative motion)
- Aakaersh
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What is the angle of displacement from the vertical for a hanging mass on Earth?
- rbwang1225
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(21-23) thermodynamics problem. Finding efficiency for the human body
- qspartan570
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What Are the Forces on a Supported Beam?
- jjd101
- · Replies 52 ·
Analyzing Spring Oscillations with Colliding Blocks
- jjd101
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Gravitational Potential Energy (Multiple Choice Question)
- McAfee
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How Do You Calculate the Period of SHM from a Cosine Function?
- Crusaderking1
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Electric potential inside a spherical shell
- TrolliOlli
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Rotational Kinematics/Momentum Problem
- jjd101
- · Replies 23 ·
(21-11) Thermodynamics problem help
- qspartan570
- · Replies 1 ·
What is the Frequency of Small Amplitude Oscillations in an Inverted Pendulum?
- jjd101
- · Replies 14 ·
Need Help in making a slow descending yo yo for science club presentation
- physics094
- · Replies 5 ·
Velocity Ball In Air: 4s, 81.6m
- C42711
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Force between 2 parallel, charged, conducting sheets.
- khfrekek1992
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Nonuniform circular motion problem.
- feathermoon
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Calculating Time and Velocity of a Falling Object
- C42711
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Rate of heat transfer passing from the boiling water to the ice bath
- lalahelp
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Entropy of a quantum sized material
- phoenix133231
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Oscillator Problem Maximum speed & amplitude
- jjd101
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Fnding the rms speed of hydrogen
- qspartan570
- · Replies 3 ·
Can a Perfect Sphere Survive a Black Hole?
- studentxlol
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Tension in Strings Holding Up Shelf
- ARL91
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Finding Amplitude and Acceleration in a Spring Oscillation Problem
- jjd101
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Entropy Change of Ice-Water System
- majormuss
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General question about linear momentum.
- -Dragoon-
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How Much Oxygen Does a Medical Cylinder Hold at Different Pressures?
- qspartan570
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Finding the harmonics of a flute
- Greywolfe1982
- · Replies 7 ·
Compute acceleration and tension in the cord
- skysunsand
- · Replies 4 ·
How Do You Calculate the Kinematics of Touching Spheres Under External Force?
- dougla
- · Replies 8 ·
Solve Momentum & Impulse Homework: Diver Leaves Raft at 4 m/s
- jer_hall99
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Relative Time Dilation and Aging in Space Travel
- disneygirl828
- · Replies 4 ·
Direction of Induced EMF (Faradays Law) Confusion
- jegues
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Box being pushed up an inclined plane
- bajangal1
- · Replies 5 ·
Induced EMF Moving Current Loop
- jegues
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Difficult circular motion problem
- utm01
- · Replies 5 ·
Constructive and Destructive Interference
- forestmine
- · Replies 26 ·
Calculating angular acceleration and angular velocity
- Dave_1984
- · Replies 10 ·
Energy conservation: sled on a hill
- tomgackle
- · Replies 7 ·
How to Calculate the Angle for a Boat Crossing a River with a Current?
- bajangal1
- · Replies 2 ·
Giraffe Pressure Difference - 20Pa
- disneygirl828
- · Replies 1 ·
How fast is an ocean wave with given displacement and time function?
- forestmine
- · Replies 6 ·
Find Displacement Amplitude for 79.8dB Wave
- Gavandeshaq
- · Replies 1 ·
Solve for Image Height: Find Hi with f, M, s & s
- PhysicsGirl90
- · Replies 7 ·
Angular Speed Problem: Understanding the Effects of Weight Release on Rotation
- kirby27
- · Replies 14 ·
Buoyant Force and Displacement Volume of a Boat in Lake Superior
- disneygirl828
- · Replies 4 ·
Solving Physics Homework: Velocity & Time of Rock in a Hole
- swiftracer
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Calculating Moment of Inertia of a cube
- yttuncel
- · Replies 13 ·
How much heat ΔQ is consumed to raise the ice temperature
- Firben
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Gauge Pressure at the Bottom of Ocean on Mars
- forestmine
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Finding RMS value of strange column function
- Twinflower
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Period of a Simple Pendulum with Varying Masses and Gravitational Forces
- rbwang1225
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Horizontal Spring Problem, just need it checked
- Becca_Gadd
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How Do You Calculate Gravity and Final Velocity on Jupiter?
- pinkcloud
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Period and amplitude of oscillations.
- deezy
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Understanding Electromagnets: Unraveling the Mystery of North and South Poles"
- Teachme
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Distance calculated from Energy
- azncocoluver
- · Replies 10 ·
Ball Rolls off of a circle :O PROBLEM
- Plutonium88
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Show that the reflected and transmitted waves are related to the incident wave
- 2thumbsGuy
- · Replies 14 ·
Calculating Angular acceleration of wheel
- AkkiJay
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Resulting directions and velocities of two circles colliding
- yortzec
- · Replies 2 ·
Need to find the net force and the average force .
- MsHomework
- · Replies 11 ·
Calculating Mean Value Error: Tips for Undergrad Lab Work | Matt's Question
- Pandabasher
- · Replies 2 ·
Calculating Water Level Rise in Low Pressure Zone | Atmospheric Pressure Effect
- qspartan570
- · Replies 1 ·
Angular Physics: Calculate Arrow Height with Velocity & Gravity
- IBdoomed
- · Replies 5 ·