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What is a material's boiling point?
It is the temperature where a liquid changes to a gas.
How do color changing shirts change color in sunlight?
The shirts contain a thermochromic (temperature sensitive) pigment which changes colour when cold or hot and when the sunlight heats up the pigment, the shirt changes colour.
Why does the resistance of a thermistor change when you change its temperature?
The resistance of a thermistor changes when its temperature changes due to the inherent properties of the thermistor material. In a negative temperature coefficient (NTC) thermistor, the resistance decreases as the temperature increases, whereas in a positive temperature coefficient (PTC) thermistor, the resistance increases as the temperature rises. This change in resistance is caused by the variation in the number of charge carriers (electrons or holes) and their mobility within the material as temperature changes.
How would you describe the changes that happened to the material when cooled?
Changes in physical properties: cooling is temperature decrease caused by heat exchange
Describe three changes in appearance which show that a chemical reaction is taking place?
The colour, the temperature and formation of gas
What is a material's boiling point?
It is the temperature where a liquid changes to a gas.
What is thermochimic film?
it's a piece of material that changes colour when applied to heat... so this isn't really a filmmaking question...
What is the least effective way of dimming tungsten lighting for colour photography?
Rheostat. Dimming by rheostat changes the colour temperature of the light
True or false The melting temperature of a solid changes with the amount of material?
True
The temperature at which a substance changes from a liquid to a solid is named?
This temperature is called freezing point and is different for each substance or material.
The temperature at which a substance changes from a solid to a liquid is calleld what?
This temperature is called melting point and is different for each substance or material.
How do color changing shirts change color in sunlight?
The shirts contain a thermochromic (temperature sensitive) pigment which changes colour when cold or hot and when the sunlight heats up the pigment, the shirt changes colour.
Is there any thermometer which changes its colour due to temperature change?
Yes,its called as "liquid crystal thermometer".
Why does the resistance of a thermistor change when you change its temperature?
The resistance of a thermistor changes when its temperature changes due to the inherent properties of the thermistor material. In a negative temperature coefficient (NTC) thermistor, the resistance decreases as the temperature increases, whereas in a positive temperature coefficient (PTC) thermistor, the resistance increases as the temperature rises. This change in resistance is caused by the variation in the number of charge carriers (electrons or holes) and their mobility within the material as temperature changes.
How would you describe the changes that happened to the material when cooled?
Changes in physical properties: cooling is temperature decrease caused by heat exchange
Why critical temperature is lower than melting temperature?
the critical temperature is for the phase stability? When the phase changes,the energy needed is smaller than the material melton,
Describe three changes in appearance which show that a chemical reaction is taking place?
The colour, the temperature and formation of gas
