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True Story:

At the height of World War II, in 1942, the British Navy had a sudden breakdown in radio communications. The British became convinced that it was a German trick. It turned out to be disturbances caused by sunspots over 93 million miles away.

The True Story of Black Hawk Down from the A&E Video Store.

Cosmos Collector's Edition Boxed set - VHS
Carl Sagan's COSMOS is one of the most influential science programs ever made.

Q. Does the moon have a dark side?

A. The moon does have a far side which is impossible to see from the earth, but it doesn't mean that it's always dark. Each side of the moon is dark for no longer than 15 days at a time.


Q. Where does sound come from?

A. The air is always filled with sound waves. All things give off vibrations, but some have a low frequency which most cannot hear. The reason: it may take 3 minutes to make a single vibration. They may be caused by earthquakes and storms.



Forms of Energy and Equivalence


Heat -energy released by combustion, and cooling effect produced by an evaporating liquid. Used to change the state of a system. Measured by a calorie.
Mechanical -several forms, includes kinetic and potential energy encountered as work. Measured in terms of force x distance, or pressure x volume. Force divided by Area x Volume equals Force x Distance.
Electrical -involves both voltage and amperage. Simply put - Volts x Amperes. Volts equals Joules/Coulombs; Amperes equals Coulombs/Second. So, Volts x Amperes equals Joules/Second. Maybe may equated to heat and mechanical energy.
Radiant -related to the frequency of wave motion by the relationship E=hv, where v is a frequency of wave motion, h is Planck's constant, 6.62 x 10-34 Joule Second. E is given in Joules when v is in reciprocal seconds.
Nuclear Energy -expressed quantitatively several ways:
Equivalence to mass - E=mc2 gives energy in Joules, derived from kilograms of matter m and c is the velocity of light, approximately 3 x 10 8 m/sec. Dimensional units of E in this relationship are Joules, so they have a means of relating nuclear energy to heat, electrical and radiant energy.
 

 
Sources:

1. Editors. Fluid Pressure: Fluid Power for Engineers. Houghton-Mifflin: NY 1987.

2. Editors. Secrets of the Universe. International Master Publishing: US. 1999


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