Rotational Mechanics
The mathematical definition of torque.
What is torque = force X lever arm?
(force is always perpendicular)
The distance from the midpoint to the top of the crest.
What is amplitude?
The part of the electromagnetic spectrum that produces heat.
What is infrared?
Being either negative or positive, a charged atom.
What is an ion?
Voltage is the measure of potential difference whereas electric current is measured in these units.
What are amperes?
(also accept amps)
One way to increase the torque on an object using the lever arm.
What is increase its length?
(apply more force is also acceptable)
This occurs when two waves meet and the amplitude increases.
What is constructive interference?
A material that does not allow light to pass through.
What is opaque?
The measure of electric charge.
What is a coulomb?
A voltage source for direct current.
What is a battery?
(also accept solar cells, fuel cells, or DC generators)
The reluctance of an object to change its rotation.
What is rotational inertia?
A wiggle in time or space.
What is a wave?
The bending of light waves when it crosses a boundary between two mediums.
What is refraction?
A material that may be used for either conducting or insulating current.
What is a semiconductor?
The relationship among current, voltage, and resistance is described by this law.
What is Ohm's law?
If an ice skater is spinning with her arms outstretched, this happens.
What is spins slower?
The unit for frequency.
What is a Hertz?
The name of the angle that is always perpendicular to the angle of incidence or reflection.
What is the normal?
The study of electricity at rest.
What is electrostatics?
The reason that birds perching on a power line do not get electrocuted.
What is negligible potential difference.
Of the two, a hoop or a solid disk, this has greater rotational inertia.
The time for a pendulum to complete one back and forth swing.
What is the period?
A unit of distance measured by the time it takes light to travel for a year.
What is a light year?
Two like charges do this.
What is repel each other?
The voltage of an average outlet in a home.
What is 120 volts.
(also accept 110 volts)