Draw a picture labeling the poles of a permanent magnet that has been cut in half

N and S pole on each half

What pole of the compass needle points north?

The north pole of the compass needle

Which of the following is NOT a way to increase the strength of an electromagnet:

a) Increase the current through the electromagnet

b) Switch the direction of the current through the electromagnet

c) Place an iron core inside the electromagnet

d) Increase the number of coils of wire in the electromagnet

B -- Switching directions will just change the poles (the right hand rule)

Would you describe a refrigerator door as 

a) magnetic

b) acting as a permanent magnet

c) having magnetic declination

d) being an electromagnet

e) capable of electromagnetic induction

a) magnetic -- can respond to forces from magnets, but it in itself is not a magnet

What two electromagnetic devices have symmetry, in that electrical energy is either used or produced through the process of electromagnetic induction.

Electric Motor

Electric Generator

This is the only type of electrical power generation that we studied with no turbine

Solar photovoltaic

Instead of burning material that has been around for thousands or millions of  years, most forms of this energy burn other things to heat up water to steam, which drives a turbine

Biomass

A specific isotope of Uranium is used in most of these electrical power plants which produces no greenhouse gases

Nuclear energy

In 2007, about 70% of the electrical energy produced came from this source

Fossil Fuels

Using the gravitational potential energy generated by the hydrologic cycle, there is very little maintenance required for these power plants.

Hydroelectric

Label the amplitude of a transverse wave

See board

Label the Wavelength of a transverse wave from trough to trough

see board

Draw the fourth harmonic of a vibrating string (standing wave)

see board

What principle states that when a sound source is moving away from an observer it will have a lower frequency and sound lower in pitch?

Doppler Effect

What is the frequency of a sound wave which has a speed of 334 m/sec and a wavelength of 56 cm? Answer in correct sig figs with standard SI unit! 

6Õ0 Hz

A photon of light can be described as having duality of which two properties?

Wave

Particle

Orange light has a frequency of 500 THz. Express this value in Hertz, using scientific notation.

5 x 10¹⁴ Hz

Compared to green light, violet light has a(n) ___________ frequency, a(n) ___________ wavelength, has  ___________ energy, and moves at a(n) ____________ speed.

Violet light has

Higher frequency

Shorther wavelength

More energy

Equal speed

A red shirt appears red because

a) it absorbs red light

b) it reflects red light

c) it emits red light

d) it reflects white light, which stimulates red cones in the eye

B - It reflects red light

What is the frequency of light (use scientific notation and answer in Hz) that has a wavelength of 65 micrometers?

4.6 x 10¹² Hz

What are the three naturally occurring magnetic elements?

Iron 

Cobalt

Nickel

What would you hear when two sound waves are out of phase (out of tune, or when notes are not harmonics of each other)

beats

Where is the most exotic location that someone in your group has traveled?

Answers may vary

What are the photoreceptors called that perceive the intensity of light (not color)

rods

Would light that has a wavelength of 434 millimeters probably be classified as 

a) gamma rays

b) ultraviolet 

c) x-rays

d) visible light

e) radio waves

E - Radio waves are only waves listed with wavelengths longer than visible light (which are measured in nanometers)

A pendulum has a string length of 75 cm, a mass of 4.5 kg, and a release angle of 23.8 degrees. How many full swings will the pendulum complete before you hear thunder if lightning flashes 4.8 miles away?

See board