World Scholars Cup 2019 - Science (Enabling Technology)

Why can a standard battery not be recharged?

• Corrosion of cathode by energy-producing chemical reaction

• Corrosion of anode by energy-producing chemical reaction

• Low rated capacity

• Dischargement

What is the correct connection between current type and direction?

• Alternating Current ("AC") - the current only flows in one direction

• Direct Current (“DC”) - changes direction periodically

• Alternating Current ("AC") - changes direction periodically

• Direct Current (“DC”) - the current only flows in one direction

Why do diffrent regions use diffrent plugs?

• Has their own advantages

• Diffrent plugs are suitable for their country

• Different countries prioritize differently

• Due to Enemy above conspiracy

How does ionizing filter work?

• Uses a bed of activated carbon to remove contaminants and impurities, using a method called chemical adsorption

• Uses high voltage to electrically charge air molecules which results in a net positive charge which then gets trapped in the filter.

• Traps pollutant molecules in the fluid to be treated and removed inside the pore structure of the carbon substrate

What was most known as "Force behind the improvement of women's position in society" ?

• Washing machines

• Dishwashers

• Vacuum cleaners

• Home robots

• Toaster

Which current does Magnetic stove (Induction cooking) use?

• High-frequency Direct Current

• Low-frequency Direct Current

• High-frequency Alternating Current

• Low-frequency Alternating Current

What does the "rapidly alternating magnetic field" penetrating the object with on the Magnetic stove?

• Joule heat

• Eddy currents

• Hydrogen bonds

• Hot air

What does the EFTPOS (Electronic funds transfer at point of sale) terminal do?

• Allows a merchant to capture required credit and debit card information

• Transmit transaction data to the merchant services provider or bank for authorization

• To transfer funds to the merchant.

• Modify the balance of the card in the magnetic strip

• Customer provides signature

What was the Quick Response Code for developed for?

• Warehouses

• Supermarkets

• Cargo transportation industry

• Reed–Solomon error correction

• Automotive industry

What are the 4 encoding type for a Quick Response Code?

• Numeric

• Upper-case Alphanumeric

• Byte/binary

• Kanji

• Lower-case Alphanumeric