This preview shows pages 1–2. Sign up to view the full content.
Lesson 1 Homework
1.
In doing a calculation, you end up with a unit of m in the numerator
and m/s
2
in the denominator. What are your final units?
2.
(a) Convert 120 km/h to m/s
(b) Convert 25 m/s to km/h
3.
If x = C
1
+ C
2
t where the unit of x is in meter and t is in seconds,
what are the units of C
1
and C
2
?
4.
How many megameters are there in a kilometer?
5.
Perform the following calculations using the correct number of
significant figures:
(i)
25
3
6.75 1.2 10
7.8 10
8.9 10
1750
−
−
××
.
(ii)
2.2
×
10
3
×
1200
×
3.56
×
10
5
.
6.
If one atom of copper has a mass of 4.8 x 10
26
kg. How many copper
atoms are there in 20 g of copper?
7.
A spherical metal shell has an inner diameter of 8.32 cm and an outer
diameter of 10.52 cm. What is the volume of the metal that makes up
the shell?
8.
Distinguish between a vector quantity and a scalar quantity. How is
speed different from velocity? How is the distance traveled by an
object different from its displacement?
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.
 Fall '10
 George
 Physics, Work

Click to edit the document details