Light Energy
Which one is NOT a light source?
(smartboard, a picture, a traffic light, and campfire)
a picture
What is Vibration?
An object moving at a constant speed belongs to ... forces
Balanced
How fast is the speed of light?
300.000 km/s
Low-frequency will produce ...
Which action requires the most force?
(throwing a tennis table ball or a basketball)
A basketball
Light travels in a straight line away from its source, called ...
A ray
What is the unit for frequency and intensity?
Hertz and Decibels
What happens when the drag force and the gravitational force are balanced during skydiving?
The skydivers will move at a constant speed
We are able to see the things
around us because they are either
.......... or they ......... light
Light source, reflect
Mention the materials to let the sound travel from the slowest to the fastest
Gases, Liquids, and Solids
There are two types of elastic forces: ... and ...
Extension/Tension and Compression
What happened to the violet colour when the white light passed through a glass prism?
It will change the direction more
What is the function of an earmuff?
To protect from hearing loss
What type of outsole surface do basketball players need for their shoes? Will it have high friction and low friction?
Rough surface and high friction