from the picture, which type of liquid has highest density?
honey
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15
A students wants to make an electromagnetic that acts like a permanent magnet, what are some easy-to-find materials that they need to?.
iron, coil wire, battery
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15
Iron with some pin are putted like this picture. Which pin will fall first?
the closest pin to the heat sources
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15
When we take a metal rod with our fingers then burn to the fire, after a few seconds we fell hot, this is an example of which process of heat transfer?
conduction
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15
Heat flows from _____ temperature to _____ temperature
higher to lower
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15
What are the magnetic materials in the earth's core that can create the earth's magnetic field?
Iron and Nickel
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15
what are the three methods of heat transfers?
conduction, convection, and radiation
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15
what is the equation to calculate density?
mass/volume
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15
A liquid can change state without boiling. After it rains, the puddles dry up even though the temperature is much lower than 100 C. The liquid water has become a gas called water vapour in the air. This is the process of ....
evaporation
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baam
Lose 15 points!
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shark
Other team loses 25 points!
Okay!
fairy
Take points!
5
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25
banana
Go to last place!
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15
What is the correct direction of the magnetic lines of force?
acts outwards from the north-pole of a magnet and inwards at the south-pole
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15
What are two ways making stronger electromagnet:
Make a coil with more turns of wire. and Make a bigger electric current flow in the coil of wire.
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boom
Lose 50 points!
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shark
Other team loses 15 points!
Okay!
rocket
Go to first place!
Okay!
banana
Go to last place!
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lifesaver
Give 25 points!
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fairy
Take points!
5
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25
shark
Other team loses 25 points!
Okay!
thief
Give points!
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15
What will happen when these magnets are brought close together?
They will repel each other.
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15
The diagram shows the cross-section of a vacuum flask containing hot liquid in a cold room. X and Y are points on the inside surfaces of the walls of the flask. How is thermal energy transferred between X and Y?