it has two reasons.one is to prevent corosion due to the elecrtolitic effect and the other is to protect operator from the line voltage.. it has two reasons.one is to prevent corosion due to the elecrtolitic effect and the other is to protect operator from the line voltage..
You can assign positive numbers to east and negative to west - or you can do it the other way round. Which direction you call positive is really quite arbitrary. In Google Maps for example, east appears as positive.
The Cathode is the negative electrode; the anode is the positive electrode
An object with equal amounts of positive and negative charge is electrically neutral.
Compound having any positive or negative particle are said to be charged particle . it is not so that there should be same number of positive or negative infact these are called saturated particle .an atom carring positive particle are called cationwhile negative particle are called anionby MK
Proton - Positive Neutron - Neutral Electron - Negative Proton - Positive Neutron - Neutral Electron - Negative
negative
a negative x a negative= a positive, a positive x a positive= a positive, a negative x a positive= a negative, and a positive x a negative= a negative. Same thing with division. a negative divided by a negative= a positive, a positive divided by a positive= a positive, a negative divided by a positive= a negative, and a positive divided by a negative is a negative. U see?
The positive regions of a function are those intervals where the function is above the x-axis. It is where the y-values are positive (not zero). The negative regions of a function are those intervals where the function is below the x-axis. It is where the y-values are negative (not zero).
To prevent the equipments from lightning strokes. Because the cloud is negatively charged at bottom it requires a zero or a positive potential to discharge, and it selects the ground (Zero potential) to discharge. If the Telecom Equipments are fed with positive the cloud will choose the low resistance tallest positively charged Antenna's to discharge, this could damage the entire setup of Telecom equipments. So the Telecom equipments are fed with Negative supply Voltage.
It removes the negative from a negative number making it positive and it does nothing to a positive number or zero.
They need both a positive connection and a negative connection to function.
The cosine function is an even function which means that cos(-x) = cos(x). So, if cos of an angle is positive, then the cos of the negative of that angle is positive and if cos of an angle is negative, then the cos of the negative of that angle is negaitive.
The logarithmic function is not defined for zero or negative numbers. Logarithms are the inverse of the exponential function for a positive base. Any exponent of a positive base must be positive. So the range of any exponential function is the positive real line. Consequently the domain of the the inverse function - the logarithm - is the positive real line. That is, logarithms are not defined for zero or negative numbers. (Wait until you get to complex analysis, though!)
To start with, when you multiply an even number of negative numbers, the answer is positive. When you multiply an odd number of negative numbers, the answer is negative. When you multiply any number of positive numbers, the answer is always positive. For positive numbers, the value of a power is always positive. For negative numbers, the value of an odd power is negative, and the value of an even power is positive. Finding roots is the inverse of taking powers, so that an odd-root function can be evaluated for any value of x. An even-root function, however, cannot be evaluated when the value of x is negative, since an even power can never result in a negative answer. The domain of an odd root function is all real numbers; the domain of an even root function is the non-negative real numbers.
Most calculators have a +/- (+ is positive, - is negative) symbol on them, which allows you to use the negative function. To do so, simply key in the number, then hit the +/- sign, which will then put the number in negative (minus) status. But if you already have a negative number, for example if you key in 25 - 30, you will have a -5, then you can hit the symbol to make it a positive number if that's what you want. In other words, when you hit that function, it will give you the opposite of what's in it at the time. For example, if the display shows a positive number and you hit that function, you will then have a negative number. If it shows a negative number and you hit that function, you will then have a positive number.
The negative sine graph and the positive sine graph have opposite signs: when one is negative, the other is positive - by exactly the same amount. The sine function is said to be an odd function. The two graphs for cosine are the same. The cosine function is said to be even.
The cosecant is the reciprocal of the sine function. Now, the reciprocal of a positive number is positive, and the reciprocal of a negative number is negative.