Which of the following is not an SI base unit?
volt
kilogram
kelvin
mole
Which line in the table shows the metric multipliers in order of increasing value?
|
A. |
μ |
c |
k |
G |
M |
|
B. |
G |
T |
n |
c |
p |
|
C. |
k | n | M | T | G |
|
D. |
p | n |
c |
G |
T |
Which product-pair of metric multipliers has the greatest magnitude?
pico × mega
nano × kilo
micro × giga
milli × tera
Which of the following values is not given to 3 significant figures?
4.00 × 102
5190
6230.00
503 00
A physicist measured the reaction time of a person pushing a buzzer to be 0.00289354 s.
Which answer gives the measurement to 4 significant figures?
0.0028
0.002893
0.003
0.0028935
What are the SI base units for gravitational field strength, g?
N
m s−2
N kg−1
J kg−1
Some physical quantities can be measured directly, whereas others can only be estimated.
Which of the following rows in the table is correct?
|
Physical Quantity |
Measurable or estimated |
|
|
A. |
length of a football field |
estimated |
|
B. |
age of the universe |
measurable |
|
C. |
potential difference of a mains supply | estimated |
|
D. |
speed of sound |
measurable |
The length of a bacterium is approximately 2 × 10−6 m, and the distance from Earth to the Moon is approximately 3.8 × 108 m.
How many orders of magnitude greater is the distance from Earth to the Moon than the length of a bacterium?
102
106
1014
1022
Cape Town is 9 700 000 m from London.
What is the order of magnitude of this distance?
106
107
108
109
