l2 - Today Announcements HW#1 is due Wednesday by 8:00 am...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
ISP209s8 Lecture 2 -1- Today • Announcements: – HW#1 is due Wednesday by 8:00 am – The first extra credit assignment is on the LONCAPA system. One short answer is all that is required. The due date is 23 January at 8:00 am. •R e v i e w • Units • Motion • Scalars, Vectors, Tensors
Background image of page 1

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

View Full Document Right Arrow Icon
ISP209s8 Lecture 2 -2- Review Time is the thing that is measured by clocks What we know about the laws of nature say the speed of light is a constant , independent of the speed of the source. – One of the implications is that moving clocks run slow – Time is relative Position – location relative to the center of a coordinate system (0,0) Velocity – rate of change of position Acceleration – rate of change of velocity • Distance = speed x time ( 60 mi = 60 mph x 1 hr)
Background image of page 2
ISP209s8 Lecture 2 -3- Time Travel • Moving at high speed is a way to travel into the future. No problem here; this is correct. • We can look into the past because, although the speed of light is fast, distances in space are large. – We see the Sun as it was 8 minutes ago – We see nearby stars as they were 4-10 years ago – The distance light travels in one year is called a light-year. – We see nearby galaxies as they were 1 million years ago – Looking out at the stars is like looking back in time. • We can move forward in time. Can we move backward in time? Maybe
Background image of page 3

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

View Full Document Right Arrow Icon
ISP209s8 Lecture 2 -4- Scalars, Vectors, Tensors • Physical quantities can have characteristics.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 19

l2 - Today Announcements HW#1 is due Wednesday by 8:00 am...

This preview shows document pages 1 - 5. Sign up to view the full document.

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