- - measurement data;
- - Calculator.
If the letter t in this section means the temperature physics, conduct temperature measurement.The thermometer can be anything.We need to be consistent with the scale of the desired degree of accuracy.Of course, it is necessary to measure both parameters at the same bulb.
second figure depends on the conditions of the problem.For example, if you need to track the change in the state of the object, remove the second indicator in some time.The most affordable experiment - to measure their body temperature in the morning and evening.Subtract the smaller number from the larger.This is the delta t.As the temperature over
time can both increase and decrease, you need the absolute difference.
The problem may be asked to change and comparison of different objects.Delta t in this case becomes somewhat different meaning, but it still remains the temperature difference.For example, you need to determine if you need to warm up the burner to melt the two different metals.Compare the melting temperature of one and other substances.Similarly as in the first case, subtract from the larger exponent smaller.If you run an experiment, first you need to warm up the burner to a lesser temperature, then add to it Dt, that will give you a different melting point metal.
In many fields of knowledge with the letter t denote time.The term "delta t» in these cases also means the difference, but in clock readings.Note the time and record the result.Wait a moment and look back on the clock.For example, the first time you looked at the clock at exactly 14 hours, and the second - after 13 minutes.The difference in this case is 13 minutes.This is Dt under the terms of this problem.
In practice quite often determine Dt without any calculations.For example, during the athletics referee's important to know how long the runners have run a particular distance.It is not particularly important, how many started the contest, announced start earlier or later than the specified time in the posters.In this case, the judge only determines Dt.At the beginning of the race he puts a stopwatch to 0, and in the end - notes the result.
Determine Dt is necessary and when comparing the movement of different objects, ceteris paribus.This method is also more understandable if we imagine the athletes.For example, a lot of competitors, they all run the same distance, but in different races.Judges need to understand who is on what place in the final table.To do this, we determined the best result - in this case a minimum.With it compares all the others.That is, each time the judges are Dt between the time the first and second, second and third athletes, etc.