Rotational Mechanics
The torque produced by a 50-N perpendicular force at the end of a 0.2-m long wrench.
What is 10 N m?
The frequency of a wave with a speed of 340 m/s and a wavelength of 0.86 m.
What is 396 Hz?
The range of waves between radio and gamma.
What is the electromagnetic spectrum?
The proportionality constant (k) in Coulomb's law.
What is 9.0 X 10 to the 9th?
(Newton-meter squared / Coulombs squared)
The source of electrons in a circuit.
What is the conducting material of the circuit?
The net torque of a seesaw in balance.
What is zero?
When the high part of one wave fills in the lower part of another wave.
What is destructive interference?
This results when materials absorb light without remission thus allowing no light to pass through.
What is opacity?
The type of charging that occurs from the rubbing of two objects together.
What is friction?
The current in a toaster that has a heating element of 14 ohms when connected to a 120-V outlet.
What is 8.6 A?
The reason for the somewhat thicker curved rim of a Frisbee flying disk.
What is to increase the rotational inertia?
The relationship between frequency and period.
What is they are inverses of each other?
Of a solar or lunar eclipse, the one more likely to occur.
What is a lunar eclipse?
The type of charge found in a lightning strike.
What is induction?
The amount of current that moves through your fingers (resistance: 1200 ohms) if you touch a battery with 6 volts.
What is 0.005 A?
Considering increase, decrease, or stay the same, the change in rotational speed of sitting on a merry-go-round and then crawling to the edge.
What is decrease?
The period and the frequency of 76 heartbeats in one minute.
What is period = 1/76 min and frequency = 76/min?
The reason that light moves slightly more slowly in the atmosphere than in a vacuum.
What are increased interaction delays?
The reasons metals are good conductors.
What is free electrons?
The reason thick wires rather than thin wires are used to carry large currents.
What is thick wires have less electrical resistance?
Of a bowling ball or a volleyball rolling down the hill, the one with the greater acceleration.
What is a bowling ball?
What happens to the period of a vibrating object if you triple its frequency.
What is decreased by one third?
The reason metals are shiny in appearance.
What is they have free electrons that vibrate, stop, and reemit light?
The amount that the electrical force changes between a pair of ions when the distance is doubled.
What is 1/4?
The amount of times an electron changes direction in a 60-Hz alternating current per second.
What is 120 X per second?
(Twice per cycle)