Observations and Data are FACTS. Scientists use observations and data to draw a conclusion. Observations lead to the recording of data. Scientists ask questions about their observations and then collect data to answer their questions, then they have their evidence. Opinions are not facts, they are simply beliefs or value judgements. Then the scientist should repeat the experiment the results from different scientists should be similar- if the results are not similar and consistent then the experiment must be done again.
<span>
</span>
They are toxic and all non metals
Incomplete question. Full text is:
"<span>Give an example of a situation in which you would describe an object's position in (a) one-dimension coordinates (b) two-dimension coordinates (c) three-dimension coordinates"
Solution
(a) One dimension example: a man walking along a metal plank. We just need to specify one coordinate, the distance from the beginning of the plank.
(b) Two-dimension example: a ball moving on a circle. In this case, we need two coordinates: (x,y) to specify the position of the ball at every instant, since it is moving on a 2-D plane.
(c) The position of an airplane in the air: in this case we need 3 coordinates, the height, the latitude and the longitude of the airplane.</span>
We look at the criteria to select a car.
If we are not too rich, we have to bother about fuel efficiency. The mileage in terms
of km per liter or miles per gallon etc.
engine power - whether it is good enough over a slope (steep) that I may encounter
frequently with my family members.
internal space / total external size : or internal space / total price:
We find these numbers. after all , we make use of the internal space on seats.
we have to know its proportion in the total volume of the car.
the axle turning capability, wheel turning ability :
see the minimum radius and span required to turn a car in a U turn.
we have to bother about its pollution, emission level.
height / width ratio, which is important for the balance of the car.
==================================
If we are looking at the economic point of view
monthly benefit/savings of using the car,converted into currency - Loan EMI
