This preview shows pages 1–3. Sign up to view the full content.
1. [1pt]
An angstrom is an older unit of length,
defined as
10
10
m.
A ly is a lightyear, the distance light travels in 1 year.
(Give ALL correct answers, i.e., B, AC, BCD.
..)
A) 8.0ly = 7.6x 10
27
angstrom
B) 5.0m = 5.0x 10
11
angstrom
C) 3.0
angstrom
= 30nm
D) 9.0
angstrom
= 9.0x 10
5
fm
E) 9.0
angstrom
= 9.0x 10
6
fm
F) 3.0
angstrom
= 0.3nm
G) 8.0ly = 7.6x 10
26
angstrom
H) 5.0m = 5.0x 10
10
angstrom
Correct, computer gets: DFGH
2. [1pt]
Calculate the volume of a spherical balloon which has a surface area of 0.0555
m
2
.
Area and Volume relations
Correct, computer gets: 1.23E03 m^3
Hint:
The area of a sphere is given by 4 times pi times r squared. this allows
you to calculate the radius. then, the volume of a sphere is given by: 4/3 pi r
cubed.
3. [1pt]
(This is a tough one! Read the hint which appears after you submit one wrong
answer.) The graph on your paper represents the function F(x)=ax
b
Make a careful determination of the value of b. You have to get within 10\% of
the correct answer to get credit.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document Correct, computer gets: 2.60E+00
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 11/07/2010 for the course PHYS 1120 taught by Professor Rogers during the Spring '08 term at Colorado.
 Spring '08
 ROGERS
 Physics, Light

Click to edit the document details