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Question 32

What is the difference between speed and velocity?

a
Velocity has distance.

b
Velocity has direction.
c
Velocity has weight.

d
Velocity has time.
Question 33
An isotope of the element nitrogen has 7 protons and 9 neutrons. What is the name of the isotope?

a
Nitrogen-16
b
Nitrogen-7
c
Nitrogen-14
d
Nitrogen-9

1 answer

Question 32: What is the difference between speed and velocity?

The correct answer is: b. Velocity has direction.
Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both the speed and the direction of that motion.

Question 33: An isotope of the element nitrogen has 7 protons and 9 neutrons. What is the name of the isotope?

To find the name of the isotope, you add the number of protons and neutrons:
7 protons + 9 neutrons = 16.

Therefore, the correct answer is: a. Nitrogen-16.
This isotopic notation includes the element (nitrogen) and the total number of nucleons (protons + neutrons).