lect 5 part 1

# Lect 5 part 1 - Question21 BasedonNewton'sfirstlaw,ifabodyismovingin acurvedpath,then A B C D E thebody'spositioncannotbe determinedprecisely

This preview shows pages 1–4. Sign up to view the full content.

2/2/2010 1 Based on Newton's first law, if a body is moving in a curved path, then Ai t is being controlled by gravity B there is a force acting on it Question 2 1 C there is no equal and opposite reaction D there is no force acting Et h e body's position cannot be determined precisely Question 2 2 If you measured your weight with very high precision scale, would you see a difference between your weight at the top of a mountain versus at the bottom of the mountain? Select the best answer. AY e s , because the force that Earth exerts on me would be slightly less because my mass increases as I move away from Earth. BY e s , because the force that Earth exerts on me would be slightly less because I am slightly farther from it. CN o , my weight will be the same everywhere. DY e s , because the force that Earth exerts on me would be slightly less because my mass decreases as I move away from Earth. If gravity were to suddenly disappear for our orbiting space shuttle astronauts, they would (by Newton’s first Law) Ag o around the Earth as before Question 2 3 Bd r o p straight down to the ground Cr e m a i n in the position it was before gravity ceased Dg o flying off in a straight tangential line (to their original orbit) En o n e of the above

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

View Full Document
2/2/2010 2 Question 2 4 Newton's Law of Gravity is F = G*m1*m2/(r*r) This equation states that if the distance between two objects increases by a factor of three, the force they exert on each other A decreases by a factor of nine decreases by a factor of nine. B increases by a factor of nine. Cd o e s not change. D increases by a factor of three. E decreases by a factor of three. Which of the following groups have electromagnetic wavelengths, all of which are shorter than visible light: A ultraviolet, microwave, radio B ultraviolet ray gamma ray Question 2 5 ultraviolet, x ray, gamma ray C infrared, microwave, radio Da l l of the above have wavelengths shorter than visible light En o n e of the above have wavelengths with all shorter than visible light Planck radiation curves have which characteristics plotted on its two axes? A d f Question 2 6 temperature and frequency B temperature and wavelength C spectral type and temperature D intensity and wavelength E frequency and wavelength
2/2/2010 3 Wien's Law relates which two properties of an object?

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 02/06/2011 for the course ASTR 113 taught by Professor Geller during the Spring '08 term at George Mason.

### Page1 / 15

Lect 5 part 1 - Question21 BasedonNewton'sfirstlaw,ifabodyismovingin acurvedpath,then A B C D E thebody'spositioncannotbe determinedprecisely

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online