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SI Unit

Motion and Forces
Atomic Basics
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Math

100

SI unit of force?

Newton

100

What force pulls objects toward the Earth?

Gravity 

100

What is Covalent Bond? 

A covalent bond is a chemical bond where atoms share electrons.

100

Which travels faster: sound or light?

Light

100

What is the formula for speed? 

Speed = Distance ÷ Time

200

SI unit for energy? 

Joule (J)

200

What is Doppler Effect?

The change in the sound (or frequency) of something when it moves toward or away from you.


200

What is Isomer?

Isomers are molecules with the same formula but a different structure.


200

What is Amplitude?

Amplitude is the height of a wave, which tells you how much energy it has.


200


What is the approximate acceleration due to gravity on Earth?

    

 9.8 m/s²

300

SI unit of power?

Watt (W)

300

What is Newton’s 3rd Law of Motion? 

Whenever one object pushes or pulls on another object, the second object pushes or pulls back with the same amount of force in the opposite direction.


300

What is Ion?

An ion is an atom with a positive or negative charge because it gained or lost electrons.


300

What is Refraction?

Refraction is the bending of light or waves when they change materials.


300

An object is placed 40.0 cm to the left of a convex lens, and it produces an image of 24 cm to the right of the lens. Determine the focal length of the lens. 

1/F = 1/P + 1/S  

1/F = 1/40.0 + 1/24.0 

1/40 = 3/120, 1/24 = 5/20

1/F = 8/120 = 1/15 

F = 15 cm

400

SI unit of time?

Seconds (s)

400

What is Newton’s 2nd Law of Motion?

Force equals mass times acceleration, meaning bigger forces cause more acceleration, while heavier objects need more force to accelerate.

F=ma


400

What is Isobar?

Isobars are atoms of different elements that have the same mass number.


400

What is Potential Energy?

Potential energy is energy that is stored and ready to be used.


400


The speed of light in a glass was determined to be 1.95 x 109 m/s. Determine the glass’s index of refraction. 


To find the index of refraction (n), use:

n = \frac{c}{v}

Where:

  • c = speed of light in vacuum = 3.00 \times 10^8 \, \text{m/s}
  • v = speed of light in the material = 1.95 \times 10^8 \, \text{m/s}

Step 1: Plug in values

n = (3.00 × 10^8) / (1.95 × 10^8)

Step 2: Divide

n = 3.00 / 1.95 ≈ 1.54


500

SI unit of distance?

Meter (m)

500

Newton's 1st Law— What will an object do if no net force acts on it?

Remain at rest or continue moving at a constant velocity in a straight line.

500

What is Isotope?

An isotope is an atom of the same element that has a different number of neutrons, making it heavier or lighter.

500

What is Kinetic Energy?

Kinetic energy is the energy of motion.


500

Find the speed of a wave with the following parameters: A frequency of 50Hz and a wavelength of 10 meters.

500 meters per second. 

v = fλ

    •    v = wave speed

    •    f = frequency

    •    λ = wavelength

Given:

    •    f = 50 Hz

    •    λ = 10 m

Solve:
v = 50 × 10 = 500 m/s