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A swinging rod is not a point bob →
Intermediate · Connect concepts. Use inertia about the pivot and weight acting at the center of mass.
Practice problem
A temperature interval has no zero offset →
Beginner · Read graphs & measurements. What is the temperature increase in kelvins?
Practice problem
A third polarizer between crossed axes →
Intermediate · Connect concepts. Find the final transmitted intensity.
Practice problem
A torque graph can reverse a rotor →
Intermediate · Read graphs & measurements. What is its angular velocity at t=4 s?
Practice problem / FREE SAMPLE
A torque starts a flywheel →
Intermediate · Apply a principle. Divide the net torque by the inertia about the same axis.
Practice problem
A virtual image has a signed position →
Intermediate · Find a missing quantity. Find the signed image position v.
Practice problem
A voltage sets the later orbit size →
Advanced · Connect concepts. Find its circular orbit radius in the magnetic field.
Practice problem
A wavelength for a moving particle →
Intermediate · Apply a principle. Find its de Broglie wavelength.
Practice problem
A weak prism bends a ray →
Intermediate · Apply a principle. Find its approximate deviation angle.
Practice problem
A wider branch can also be longer →
Advanced · Connect concepts. What volume flow goes through tube B?
Practice problem
A wider orbit takes how much longer? →
Intermediate · Compare cases. What is the ratio of the outer satellite’s period to the inner satellite’s?
Practice problem
A zero derivative hides a finite range →
Advanced · Apply a principle. What is the largest possible value of y?
Practice problem
Acceleration from a speed-position law →
Advanced · Connect concepts. Find its acceleration where this motion law applies.
Practice problem
Account for the binding already present in the fuel →
Intermediate · Connect concepts. What is the reaction energy release under these rounded values?
Practice problem
Account for the work as well as cooling →
Intermediate · Apply a principle. How much heat does it reject to the hot surroundings per cycle?
Practice problem
Add expansion over the temperature interval →
Advanced · Apply a principle. What is the first-order extension?
Practice problem
Add intensities before decibels →
Intermediate · Compare cases. Find the level when both operate together.
Practice problem
Add moments about intersecting axes →
Beginner · Apply a principle. Find its moment of inertia about the normal axis through the center.
Practice problem
Add one charge without recounting old pairs →
Advanced · Connect concepts. What work does the external agent do during this addition?
Practice problem
Adjacent resonances reveal the fundamental →
Intermediate · Read graphs & measurements. How many displacement antinodes are present in the 480 Hz mode?