Question 1

The number 0.0001070 has how many significant figures?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  7

Question 2

Find the sum of the following two vectors: (i)50 units due east and (ii)100 units 30° south of west.

Accepted Answer

A)  100 units 30° south of west 
B)  62 units 54° south of west 
C)  87 units 60° south of west 
D)  62 units 15° south of west

Question 3

In 1983 the standard meter was redefined to what it is currently.What was the previous definition from 1960 based on?

Accepted Answer

A)  specific alloy bar housed at Sevres,France 
B)  wavelength of light emitted by certain krypton atoms 
C)  distance from the Earth's equator to the North Pole 
D)  the distance light travels in a certain fraction of a second

Question 4

Which of the following conversion factors is not exact?

Accepted Answer

A)  12 in.= 1 ft 
B) 
 
C) 
 
D)

Question 5

A train slowly climbs a 600-m mountain track which is at an angle of 10.0° with respect to the horizontal.How much altitude does it gain?

Accepted Answer

A)  86.8 m 
B)  104 m 
C)  106 m 
D)  492 m

Question 6

V Is 3.0 units in length and points along the positive x axis;vector 
Is 5.0 units in length and points along a direction 150° from the positive x axis.What is the magnitude of the resulting vector when vectors   And Are added?

Accepted Answer

A)  7.0 
B)  6.7 
C)  2.8 
D)  2.1

Question 7

Vector 1 is 7 units long and is at 70°.Vector 2 is 5 units long and is at 155°.Vector 3 is 3 units long and is at 225°.Which vector has equal-magnitude components?

Accepted Answer

A)  Vector 1 
B)  Vector 2 
C)  Vector 3 
D)  None of the vectors has equal-magnitude components.

Exam 1: Introduction: Part A

The number 0.0001070 has how many significant figures?

Find the sum of the following two vectors: (i) 50 units due east and (ii) 100 units 30° south of west.

In 1983 the standard meter was redefined to what it is currently.What was the previous definition from 1960 based on?

Which of the following conversion factors is not exact?

A train slowly climbs a 600-m mountain track which is at an angle of 10.0° with respect to the horizontal.How much altitude does it gain?

Vector 1 is 7 units long and is at 70°.Vector 2 is 5 units long and is at 155°.Vector 3 is 3 units long and is at 225°.Which vector has equal-magnitude components?