PHYS-1305
CH-1
Name: _________________________________________
Marks: _____ / _____
HOMEWORK CHAPTER-1: A WORLD VIEW
Circle the correct answers
1-
The kind of physics models which are easiest to understand and accept are ones that
a) correspond to simple physical models.
b) have just been discovered.
c) win Nobel prizes.
d) require significant mathematical sophistication.
2-
Bode's law was never considered to be a law of physics because
a) it wasn't testable.
b) it wasn't consistent.
c) it turned out not to be true.
d) it had no scientific basis.
3-
Which of the following is NOT a basic unit of the metric system?
a) meter
c) kilogram
b) second
d) pound
4-
Which of these equalities is NOT correct?
a) kilo = 103
b) mega = 106
c) milli = 103
d) centi = 10−2
Which of these equalities is correct?
a) kilo = 103
b) mega = 104
c) milli = 103
d) centi = 102
Which of these is correct?
a) kilo = 100
b) centi = 100
c) milli = 1000
d) centi = 1/100
5-
6-
7-
Which list of metric prefixes is in order from smallest to greatest?
a) milli, centi, mega, kilo
d) mega, kilo, centi, milli
b) kilo, mega, milli, centi
e) centi, milli, kilo, mega
c) milli, centi, kilo, mega
8-
Positive exponents indicate ___ numbers and negative exponents indicate ___ numbers.
a) large … large
c) large … small
b) small … small
d) small … large
9-
An order of magnitude is:
a) A law of physics.
b) The direction of a vector.
c) The size of an object.
d) The value of a number rounded to the nearest power of ten.
10-
The number of seconds in a year is approximately 31,600,000, or
a) 3.16 × 105.
c) 3.16 × 107.
6
b) 3.16 × 10 .
d) 3.16 × 108.
PHYS-1305
11-
12-
13-
14-
CH-1
The value of the expression 43 is
a) 4 × 10 × 10 × 10
b) 4 × 4 × 4
c) 4 × 3
d) 4 + 3
The value of the expression 9 × 104 is
a) 9 × 40
b) 9 × 9 × 9 × 9
c) 90,000
d) 0.0009
The value of the expression 9 × 10−4 is
a) −9 × 40
b) -4(9)
c) 90,000
d) 0.0009
What is the product of 3 × 103 and 2 × 105 ?
a) 5 × 108
b) 6 × 108
c) 5 × 1015
d) 6 × 1015
Problems:
1.
How many seconds are there in a week?
2.
How many inches are there in a kilometer?
3.
Write the following as an ordinary number:
4.
5.
.
a)
2.123 x 10-5
b)
2.392 x 104
Write the following in scientific notation:
a)
2,382,593
b)
0.000213
Calculate:
a)
46 x 21 + 32 x 41 – 36 x 2 =
b)
23 + 12 x 4 / 3 + 5 =