l7 - Today Announcements: HW#4 is due by 8:00 am Wednesday...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
ISP209s8 Lecture 7 -1- Today • Announcements: – HW#4 is due by 8:00 am Wednesday February 14th. – The second and third extra credit assignments are open and are due in two weeks at 8:00 am on Feb 13 th – Exam #1 is next week on Thursday, there is an important review lecture on Tuesday • General Relativity
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ISP209s8 Lecture 7 -2- Something to tell your friends about… 2 Newton’s second law of force tell us that
Background image of page 2
ISP209s8 Lecture 7 -3- Picture The following is a picture of a chemical reaction: Start with some initial mass (kg) Something happens End up with some final mass (kg) f- see the table on the next page Some fraction, f, is converted to energy ENERGY (Joules, J) The amount of energy is E = m converted c 2 m converted = (Mass to start) x fraction
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ISP209s8 Lecture 7 -4- Fraction of Energy Converted • In a chemical reaction not all the mass can be converted to energy. Actually only a very small fraction (the exact value of the fraction depends on the chemical reaction). Reaction Fraction Example Matter-Antimatter Annihilation 1 No common example; happens at particle accelerators Fusion 0.007 Power source of the Sun Fission 0.001 Nuclear power plant Chemical 1x10 -10 Burning coal Mechanical 1x10 -15 Compressing a spring
Background image of page 4
ISP209s8 Lecture 7 -5- Some Samples • A power plant generates 500 MW of electrical power and 700 MW of waste heat (plants always make more waste heat than electrical power). How many Joules of energy does the plant generate in 1 day? Data: 1 Watt = 1 Joule/s d
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

l7 - Today Announcements: HW#4 is due by 8:00 am Wednesday...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online