Scientific Notation and Variables in Python: Key Concepts for PCEP-30-02 Exam

Question 1: Which of the following represents a number in scientific notation in Python?

1. 1.23e3
2. 123.0
3. 1.23*10^3
4. 123e

Question 2: What is the value of the scientific notation 2.5e-4 in decimal form?

1. 0.00025
2. 25000
3. 0.025
4. 0.000025

Question 3: Which of the following are valid scientific notation representations in Python? (Select all that apply)

1. 3.14e2
2. 6.02e23
3. 1.6e-19
4. 1e

Question 4: Match the following scientific notation literals with their decimal equivalents.

Question 5: Fill in the blanks: The scientific notation 1.2e3 represents the decimal number ______, and the notation 4.5e-2 represents the decimal number ______.

Question 6: Arrange the following scientific notations in order from smallest to largest.

Question 7: Fill in the code to assign the value 6.022e23 to a variable named avogadro.

avogadro = _______

Question 8: Insert the missing line of code to define a variable that holds the value 9.81e0.

gravity = _______
print(gravity)

Question 9: What will be the output of the following code?

mass = 1.67e-27
print(mass)
 

1. 1.67e-27
2. 1.67
3. 0.00000000000000000000000000167
4. 1.67*10^-27

Question 10: Which of the following represents the number 5000 in scientific notation?

1. 5e2
2. 5e3
3. 5e4
4. 5e-3

Question 11: Which of the following statements about scientific notation in Python are true? (Select all that apply)

1. It uses the letter e to indicate the power of 10.
2. It can represent very large or very small numbers compactly.
3. It requires a number before and after the e.
4. It cannot represent negative exponents.

Question 12: Match the following scientific notation values with their descriptions.

Question 13: Fill in the blanks: The scientific notation 2e3 represents the number ______, and the notation 3.5e-3 represents the number ______.

Question 14: Arrange the following numbers from smallest to largest based on their scientific notation.

Question 15: Fill in the code to assign the scientific notation value 3.14e-2 to a variable named small_number.

small_number = _______

Question 16: Insert the missing line of code to define a variable that holds the value 1.23e4.

large_number = _______
print(large_number)

Question 17: What will be the output of the following code?

speed_of_light = 3.0e8
print(speed_of_light)

1. 3.0e8
2. 300000000
3. 3.0*10^8
4. 3.0 x 10^8

Question 18: Which of the following represents the number 0.0001 in scientific notation?

1. 1e-3
2. 1e-4
3. 1e4
4. 1e3

Question 19: Which of the following are valid uses of scientific notation in Python? (Select all that apply)

1. 4e5
2. 2.1e-3
3. 7e
4. 1e2

Question 20: Match the following scientific notations with their equivalent standard notations.

Question 21: Fill in the blanks: The scientific notation 1.5e2 represents the number ______, and the notation 6.7e-1 represents the number ______.

Question 22: Arrange the following scientific notations in order from largest to smallest.

Question 23: Fill in the code to assign the scientific notation value 4.5e6 to a variable named population.

population = _______

Question 24: Insert the missing line of code to define a variable that holds the value 8.31e-3.

constant = _______
print(constant)

Question 25: What will be the output of the following code?

distance = 1.5e11
print(distance)

1. 1.5e11
2. 150000000000
3. 1.5*10^11
4. 1.5 x 10^11