Homework to do for engineering class

ENGR 112

HW#1 NAME________________________

1

1. Rewrite the following numbers in scientific notation and round them to Three
significant digits. Also, rewrite the numbers in engineering notation using all significant
digits.

Scientific Engineering

a. 0.00856

2

b. 69520300

c. 6596.523×10

2

d. 0.5692

e. 5.3954

2. What is the number of significant digits for each number below?

a. 0.2569000 b. 6.5900×10
5

c. 9586000 d. π

3. Perform the following mathematical operations and present the answers to the
correct number of significant figures in scientific notation.

a. 523.468 + 85.650 – 25.698

b. -0.007658 + 22.0006 + 12.265

c. π – 52.69 x 10

-1

d. 85.694 + 1.236 – (5.897 + 0.00263)

ENGR 112 HW#1 NAME________________________

2

4. Perform the following mathematical operations and present the answers to the
correct number of significant figures in scientific notation. Assume all exponents are
exact.

a.

(0.9563 × 10−2)(0.010096)

(19.678)(81902501)

b.

(𝜋)(659)(6.23 × 105)

𝑐𝑜𝑠(55.8°)√859.33 + 12.5675

c.

(52.562)𝑡𝑎𝑛(99.3°)

(88.60.31)(9826870)

d.

(5.654 × 10−3)(100.9.2 ) +
1566.99

3.6983

ENGR 112 HW#1 NAME________________________

3

5. Express the following quantities in terms of their fundamental dimensions using the
“absolute” dimensions M, L, and t:

a. Force

b. Work

c. Torque

d. Velocity

e. Pressure

f. Mass Density

g. Power

h. Acceleration

i. Volume