Forces and Motion
What is the unit used for force?
Newtons
Is there work done when a person pushes a wall? Explain.
There is no work done because the applied force was unable to make the object move.
True or False. Sound waves are transverse.
False. Sound is longitudinal. Light is transverse
Radiation that travels through a medium (or lack thereof), allowing objects to be visible.
Light
What is Thermal Energy?
The amount of energy possessed by particles in a system. These particles, when containing energy, move from one place to another.
Guess what is this based on the emojis: 🌌☄️🧲🌍
Gravity
The unit for work is Joules or...
Newton-meters
Travels through different types of medium, but cannot travel through a vacuum
Mechanical waves
What is the speed of light?
299,792,458 m/s
Occurs when an object absorbs heat from its surroundings, going from a denser to rarer state
Endothermic
When the car accelerates _______, the person by moving _______.
Forward-backwards
Gravity is always equals to 9.81 m/s^2.
False. Gravity is different in other planets.
Sound travels in a direction ______ to the material action.
Parallel
Crests and Troughs
Celsius = Farenheit - 32 (9/5) True or False?
False, 5/9
Give an example of Uniform Circular Motion (real life situation).
Motion of artificial satellites around the earth
What does the Greek word "kinetikos" mean?
Moving
Describe the particle space in the different state of matter.
Solids: closely packed Liquids: a bit distant Gases: far apart
What is the difference between time and period?
Frequency - the number of full waves that pass through in a second
Period - the time it takes for one full vibration
What are the three exothermic reactions?
Freezing (L-S) Condensation (G-L) Deposition (G-S)
Explain the three laws of motion. Give examples.
Alam nyo na yan
ACTUAL EQUATION NERDS: A book (4.25kg) is lifted from the floor and placed on a 3.75 m tall table. What would be the potential energy?
PE = 156.35 J
Echoes can only be heard distinctively __ meters from the source.
17
What is the index of refraction of a diamond?
2.147
What does Q mean in the formula for heat?
Heat applied