Describe values and value-system?

positive< Mitzy >

positive or negative change of velocity or change of direction of the speed vector

Because they didn't create it that way. There is no real reason they need one. I guess they decided they didn't want one or didn't think about that idea yet. There is no place value system in roman...

Heat is energy and cannot be negative, If you are talking about heat flow then if you define outflow to be negative then inflow is positive.

education is having much value in day to day life becauz if we will nt go to schools to get education then we will known as anpar gawar nd we will nt get any job for earning money