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.
No, not all matter has a negative or positive charge. Matter can be neutral, meaning it has an equal number of positive and negative charges, such as in most atoms. Charged particles exist in matter, such as electrons with a negative charge and protons with a positive charge.
proton positive neutron neutral electron negative
Yes, water can be deflected by a non-uniform electrostatic field. Water molecules are polar, meaning they have a positive charge on one end and a negative charge on the other. When a non-uniform electrostatic field is applied, the positive and negative ends of the water molecules will experience different forces, causing the water to be deflected.
Anthrax is a gram-positive bacterium, meaning it retains the crystal violet stain in the Gram staining procedure.
No, if both parents are O negative (meaning they do not have the Rh antigen), they cannot have a Rh positive baby. RH positive blood type requires the presence of the Rh antigen when processing blood types.
No, the magnitude of force cannot be negative. Force is a vector quantity, meaning it has both magnitude and direction. The magnitude of force is always a positive value, representing the strength of the force applied.
No, not all matter has a negative or positive charge. Matter can be neutral, meaning it has an equal number of positive and negative charges, such as in most atoms. Charged particles exist in matter, such as electrons with a negative charge and protons with a positive charge.
It is a negative word. Meaning negative, dreary, sad, etc.
fearless is positive, meaning brave, courageous.
When you multiply any number by a negative number you reverse its sign. So positive numbers become negative, and negative numbers become positive. That is the meaning of negative multiplication; it is reversal. This is similar to the way that adding a negative number has the same effect as subtracting a positive number. Negative is the opposite of positive.
opposites somehow like a positive number is the opposite of a negative and a negative number is the opposite of a positive
A decimal or fraction is not an integer. An integer is a positive or negative whole number. Meaning that a positive or negative fraction or decimal is not an integer.yes by what the paper says
'too' (adverb) can have a positive, a neutral or a negative meaning.# Positive: He's too handsome for words! = He is so handsome, I can't describe how handsome he is! # neutral: Are you coming too? # negative: This soup is too hot.
The following are factors of 750, meaning they go into 750 a certain number of times. To find out how many times the number goes into 750, find the corresponding number on the other side of the array. For instance to see how many times 5 goes into 750, find the 4th-last number in the array (150):1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 125, 150, 250, 375, 750
ll im not sure of the scintific meaning but i know polar means that a molecule on only slightly more postivie than negative or vise versa. like water is only slightly more positive than negative because hrdrogen is positive and oxygen is negative for a ratio of negative to positive making it 2:1
proton positive neutron neutral electron negative
Yes, water can be deflected by a non-uniform electrostatic field. Water molecules are polar, meaning they have a positive charge on one end and a negative charge on the other. When a non-uniform electrostatic field is applied, the positive and negative ends of the water molecules will experience different forces, causing the water to be deflected.