Questions

Answer A is tempting because the problem focuses on changes. However, because we are talking about the elaboration of the product's characteristics, we are talking about scope changes, and therefore Answer B is the best answer. Answer C is also tempting because it is difficult to more forward on a project until the scope is clearly defined (especially in systems development projects), but with products and certain types of web development, scope changes can be frequent, and a formal scope management plan is needed. Answer D is true from a project perspective, but does not addres the scope issues.

a -  at the peak of changes in blood pressure indicates the systiolic pressure.

The Communist Government of Yugoslavia had kept itself free from the Soviet Union almost from the beginning . Yugoslavia was one of the founders of the Non-Aligned Movement. It was a fedaration of 6 republics. In four of these republics, the rule of the communist parties came to an end in 1990. By 1992,Yugoslavia broke up into five independent states-the new states of yugoslavia comprising Serbia and Montenegro, Croatia, Macedonia, Slovenia and Bosnia-Herzegovina.

Kinetic Energy K.E = 12mV2  or 

K.E ∝V2, Where 'm' is the mass and 'v' is the velocity of molecules.

Velocity is proportional to temperature. Hence, KE is proportional to temperature and would increase with temperature.

You have to consider three things.

1. First, are the bonds polar?

Look at differences in electronegativity and if  it is >0.5, bonds are polar.

2. Second, does the molecule have unshared electron pairs?

If so, they generally lead to a polar molecule.

3. Third, is the molecule symmetric?

If so, then although the bonds may be polar, the symmetry cancels out the individual bond polarity and the molecule is non polar.

CF4 follows all the rules above and has a symmetric distribution of charge, making it nonpolar. The others all have asymmetric charge distributions.

Hence, CF4 represents a Non-polar molecule.