sign of g

When a bullet is fired from a gun, the gun moves backwards when the bullet leaves the barrel. This can be proved using the law of conservation of momentum. Let m g and m b be the masses of the gun and the bullet respectively. Firstly, we have to identify that the gun with the bullet ..

Reactants are written on the left side separated by + signs. Products are written on the right, also separated by + signs. ' D ' (the greek capital letter delta) placed over or below the arrow means that heat was added to the reactants. (g) means that the substance is ..

. Oxygen supports burning and breathing, so does air. Carbon dioxide turns limewater Milky white, so does air. Thus, as each constituent of air retains its own property, it exhibits the property of one or all of its constituents. c) There is no sign of any chemical change when air is form..

(Pt), H 2 (g, 1 atm) H + (aq) (1 mol L -1 ) Cu 2+ (ag) (1 mol L -1 ) Cu(s) at 298 K is called the standard electrode potential of cupric ion - copper electrode denotes as The EMF of the cell is:..

>Oxygen is present 21% by volume in air. It supports life and combustion. It is added to air by photosynthesis and removed from air by respiration and combustion. Nitrogen is present 78% by volume in air. It is present in proteins, which are essential for life. It is removed from air by lightning a..

. The refracted ray bends away from the normal C A N and moves along AI. Since the two refracted rays AI and BI actually meet, I represent a real image. Now, from Snell's law (Since refraction occurs from denser to rarer) or m 2 sin i = m 1 sin ror m 2 i = m 1 r (as i and r are small angles) In D O..

B shows that one mole of A produces one mole of B and thus the rate at which the concentration of A decreases will be the same as the rate at which the concentration of B increases. The decrease or increase in the concentration of the reactants or products may also be expressed in terms of change i..

. An important example is that of a single pulse of oscillation: Such a single pulse would look like the central hump in the above figure and is called a wave packet. We shall now show how a wave packet can be built up out of a group of neighboring sine waves. Starting with the result in below figu..

. where r , called resistivity is a property of the material and depends on temperature and pressure. Electrical resistivity of substances varies over a very wide range. Metals have low resistivity, in the range of 10 - 8 W m to 10 - 6 W m. Insulators like glass and rubber have 10 2 2 to 10 2 4 tim..