### Physics – tutorial supports (video)

Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.

2-dimensional momentum problem

2-dimensional momentum problem (part 2)

Acceleration of Aircraft Carrier Takeoff

Amplitude, Period, Frequency and Wavelength of Periodic Waves

Average Velocity for Constant Acceleration

Calculating Average Velocity or Speed

Calculating dot and cross products with unit vector notation

Calculus proof of centripetal acceleration formula

Centripetal Acceleration (part 3)

Centripetal Force and Acceleration Intuition

Clearing the Green Monster at Fenway

Conservation of angular momemtum

Correction to Force of Friction Keeping the Block Stationary

Correction to Total Final Velocity for Projectile

Deriving Displacement as a Function of Time, Acceleration and Initial Velocity

Deriving Max Projectile Displacement Given Time

Different Way to Determine Time in Air

Displacement from Time and Velocity Example

Doppler effect formula for observed frequency

Doppler effect formula when source is moving away

Electric Potential Energy (part 2– involves calculus)

Electrostatics (part 1): Introduction to Charge and Coulomb’s Law

Force of Friction Keeping the Block Stationary

Force of Friction Keeping Velocity Constant

Gravity for Astronauts in Orbit

Green Monster at Fenway Part 2

Harmonic Motion Part 2 (calculus)

Harmonic Motion Part 3 (no calculus)

Ice Accelerating Down an Incline

Impact Velocity From Given Height

Inclined Plane Force Components

Intro to springs and Hooke’s Law

Introduction to Harmonic Motion

Introduction to mechanical advantage

Introduction to Newton’s Law of Gravitation

Introduction to the Doppler Effect

Introduction to Vectors and Scalars

Introduction to work and energy

Intuition on Static and Kinetic Friction Comparisons

Launching and Landing on Different Elevations

Magnetism 12: Induced Current in a Wire

Magnetism 6: Magnetic field due to current

Momentum: Ice skater throws a ball

Moving pulley problem (part 1)

Moving pulley problem (part 2)

Normal Force and Contact Force

Object Image and Focal Distance Relationship (Proof of Formula)

Object Image Height and Distance Relationship

Optimal angle for a projectile part 1

Optimal angle for a projectile part 2 – Hangtime

Optimal angle for a projectile part 3 – Horizontal distance as a function of angle (and speed)

Optimal angle for a projectile part 4 Finding the optimal angle and distance with a bit of calculus

Parabolic Mirrors and Real Images

Plotting Projectile Displacement, Acceleration, and Velocity

Potential energy stored in a spring

Projectile Motion with Ordered Set Notation

Projectile Motion with Unit Vectors

Projectile Motion with Unit Vectors (part 2)

Proof (Advanced): Field from infinite plate (part 1)

Proof (Advanced): Field from infinite plate (part 2)

Race Cars with Constant Speed Around Curve

Relationship between angular velocity and speed

Specular and Diffuse Reflection

Specular and Diffuse Reflection 2

Spring potential energy example (mistake in math)

Static and Kinetic Friction Example

Tension in an accelerating system and pie in the face

Total Displacement for Projectile

Total Final Velocity for Projectile

Unit Vectors and Engineering Notation

Visual Understanding of Centripetal Acceleration Formula

Visualizing Vectors in 2 Dimensions

When the source and the wave move at the same velocity

Why Distance is Area under Velocity-Time Line

Work/Energy problem with Friction

Would a Brick or Feather Fall Faster

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RSNA: ACR connects RSNA attendees with Congress to support imaging

CHICAGO–In the American College of Radiology booth (4623) at the 97th annual meeting of the Radiological Society of North America, the college is providing iPads where imaging stakeholders can tell their Member of Congress to cosponsor H.R. 3269, the Diagnostic Imaging Services Protection Act. RSNA attendees can enter their zip code and either thank their congressman for their support or tell them to get on board with H.R. 3269 with a click of a button.

To date, a bipartisan group of more than 80 congressional leaders, including Reps. Barney Frank (D-Mass.) and Joe Wilson (R-S.C.), have joined together to co-sponsor HR-3269 that prevents Centers for Medicare & Medicaid Services’ multiple procedure payment reduction (MPPR) for radiologists from taking effect in January.

If it were to go into effect, the MPPR would impose a 25 percent payment reduction to the professional interpretation of advanced diagnostic imaging services for multiple imaging studies administered to the same patient, by physicians in the same practice setting, on the same day.