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Why does the resistance of a thermistor decrease as the temperature rises?
Some materials have negative temperature coefficients of resistance, and some have positive temperature coefficients. Carbon is an example of a substance with a negative thermal coefficient of resistance, so it's resistance will decrease as it gets hotter.
When an increase or decrease is expressed as a percent (Hint the amount of change divided by the original number multiplied by 100)?
It is a percentage change - unless the increase changes a negative number to a positive number or a decrease does the opposite.
The decrease in the pharaohs' power had a positive or negative effect on Egypt?
positive i think
If a carbon resistor increases in temperature its resistance will?
This depends on the type of conductor. If the conductor has a positive coefficient the resistance will increase. If the conductor has a negative temperature coefficient the resistance will decrease.
Are nagative numbers always numbers decimal negative?
Any number, negative or positive, can be expressed as a decimal number. So a negative number can always be expressed as a negative decimal.
How the resistance of conducting material vary with temperature?
Well, there's typically two types of materials-Those with positive temperature coefficient and those with negative temperature coefficient. Positive temperature coefficient are those whose resistance increases as temperature increases. Negative temperature cofficient are those whose resistance decrease when the temperature increase. There are however some alloys such as Manganin& Constantan whose resistance is not affected by temperature
How can a rational number be positive?
A rational number is simply a number that can be expressed as a fraction, with integer numerator and denominator. Such a number can be positive, negative, or zero.A rational number is simply a number that can be expressed as a fraction, with integer numerator and denominator. Such a number can be positive, negative, or zero.A rational number is simply a number that can be expressed as a fraction, with integer numerator and denominator. Such a number can be positive, negative, or zero.A rational number is simply a number that can be expressed as a fraction, with integer numerator and denominator. Such a number can be positive, negative, or zero.
What does it mean for a negative to be decreased by a negative?
It becomes less negative To explain. Lets take a negative, eg -5. If we decrease it by 1, it becomes -6 (where 1 is positive) Thus if we decrease it by -1, it becomes -4 (as the -1 is negative) Note that the final number could be positive, For example, if you decrease -5 by -6, you get +1
Is endothermic positive or negative why?
Endothermic processes are characterized by a positive change in enthalpy, meaning they absorb heat from their surroundings. This absorption of energy results in a decrease in the temperature of the surroundings, which is why the enthalpy change (ΔH) is considered positive. In contrast, exothermic reactions release heat, resulting in a negative ΔH.
Is fifteen degrees positive or negative?
This is a positive temperature on the Celsius scale and negative on the other scales.
Does a safe reactor have a positive or negative 'temperature coefficient of reactivity'?
negative 'temperature coefficient of reactivity'
What is the significance of the concept of negative Kelvin in thermodynamics and how does it challenge traditional understanding of temperature?
The concept of negative Kelvin in thermodynamics is significant because it challenges the traditional understanding of temperature. In traditional thermodynamics, temperature is always positive, but negative Kelvin temperatures suggest a system with a higher energy state than any system at positive temperatures. This challenges the idea that temperature can only increase or decrease in a positive direction, opening up new possibilities for understanding extreme states of matter and energy.
