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Is the result of the colliding with atoms as current flows in a material?
Let us stick on to the principle of conservation of energy. Electron being driven by the electric field gains kinetic energy. But when an electron gets into the field of the positive nucleus its potential energy is denoted with negative sign. This means that it gives out energy to the surroundings in the form of heat. So when the drifted electrons collide with the nucleus of the atoms heat is produced. This is known to be joule's heating effect.
How can you distinguish between positive and negative terminals?
if you are asking about the terminals of a cell then i can tell you.There is a plus(+) sign near the positive terminal and a minus(-) sign near the negative terminal.
When you comb your hair with a plastic comb what will the sign be on the charge acquired by the comb?
Negative.
When is energy negative?
Because of the laws of enthalpy and entropy, free energy is always increasing. However, in endothermic reactions, or chemical reactions that require energy to occur, net free energy is negative because the energy is "lost" to the environment as it is bonded in the reaction. Energy is often defined in reference to something else, and the sign of the energy is a function which direction is flowing. If energy (heat) flows from a system to the environment, the enthalpy change is negative (exothermic), whereas if energy flows from the environment to the system, the enthalpy change is positive (endothermic).
What point of a wave has negative amplitude?
The trough of a wave appears to have a negative amplitude. However, because amplitude is a distance measurement, which is a scalar quantity having only magnitude, it has no sign.
How do you determine a work done is positive sign or negative sign?
If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.
What is the first law of thermodynamics applied to closed and open system showing the meaning of the positive and negative sign of heat and work?
The first law of thermodynamics states that: "The internal energy of a system is a function of its state. Any increase in the internal energy of a system is equal to the sum of the heat supplied to the system and the work done on the system." In equations, this is stated as: DU = DQ + DW where DU is the INCREASE in internal energy DQ is the heat SUPPLIED DW is the work done ON the system So, if heat is lost by the system, it means that DQ is negative and if work is done by the system, it means that DW is negative. The best way to answer thermodynamics questions involving the first law is to think logically about what calculations should be made. If you do this, you will never make mistakes about signs.
Define endothermic and exothermic reaction in terms of sign of?
Endothermic are those which take heat so the sign of energy released will be negative and of change in heat is whcih is equal to heat of product - heat of reactant so in this case Hp - hR = -ve
Why is the enthalpy change of combustion always negative?
It is and exothermic reaction, which means energy is given out heating the surroundings.
What is work in chemistry?
Work is energy lost from a contained system.
Does the negative sign come before or after the dollar sign?
Does the negative sign come before or after the dollar sign?The negative sign comes before the dollar sign.
Which are the positive and negative?
The ones with the + sign are positive. The ones with the - sign are negative.
How is the amount of heat needed to melt ice related to the amount of heat needed to freeze the same amount of water?
The two amounts are the same but have the opposite sign (positive vs negative).
Is lactation a sign of being in heat?
No, lactation is not a sign of heat.
What does the negative terminal of a battery have?
The negative terminal of a battery has a - sign and positive terminal has a + sign.
What is a positive and negative?
a positive has a + and a negative has a - sign
When you multiply a negative by a positive what sign do you get?
You get a negative.
