Which of the statements below is false about convection heat transfer?

• Aircon is placed near the ceiling

• If you touch a hot stove, heat will be transferred to your finger and your skin will burn.

• Convection is a heat transfer from the bottom to top through the movement of molecules

• Ice melting once taken outside the fridge

Which method that doesn't need medium to transfer heat energy?

• Conduction

• Convection

• Radiation

• All of these

Which of the following mirror forms a real image?

• plane mirror

• convex mirror

• concave mirror

• convex lens

Which mirror that formed a laterally inverted image and is always virtual?

• Plane mirror

• Convex mirror

• Concave mirror

• Convex lens

The process of removal of salt from sea water is called

• Salination

• Desalination

• Evaporation

• Precipitation

Which of these is not a reason for water scarcity?

• Global warming

• Industialization

• Water pollution

• Rainwater harvesting

What principle that works on thermometer?

• Themal expansion

• Simple Pendulum

• Thermodynamics

• Gravity

Which of the following statements below is false about how the thermos flask maintains its temperature?

• Use of vacuum to reduce the conduction of heat

• Silvery surfaces on the thermos flask wall to reflect back the heat to the inside container

• Double walled to reduce the radiation process

• Minimizing the exhcange heat

Which of the following statements below is false about sea breeze?

• Sea breeze is when the cool air from the sea moves to the land

• Sea breeze happens during the day

• Sea breeze is usually happened at night

• Sea breeze can be felt if you are near the shore

magnifying lens used a

• concave lens

• concave mirror

• convex lens

• convex mirror