Heart palpitations are described as feeling like your heart is racing or pounding. Palpitations can be caused by anxiety, panic disorders, overeating, pregnancy, and abnormal heart rhythms (arrhythmias). Most palpitations are not serious, however, palpitations caused by a heart condition like atrial fibrillation or Afib can be serious and require medical treatment.
WEIGHING BY DIFFERENCE (From Dr. David Chesney) Weighing by difference is the most accurate method to measure quantitatively the mass of a solid sample. This procedure involves repetitive weighings of a weighing bottle containing a quantity of solid reagent. As the solid is removed to another vessel, the mass of the weighing bottle contents decreases.
Weight is measured with different types of balances; in the SI  system the unit is kilogram (also used multiples).      Answer     Unfortunately, the origi â¦ nal answer is incorrect.     'Weight' is a force due to gravity and, therefore, is  measured in newtons in SI.Weight is measured using a spring  balance, calibrated in newtons.Because weight is affected by  gravity, an object of given mass will have a different weight,  according to where it is measured.     'Mass', on the other hand, is measured in kilograms in SI.   'Weight' is a force due to gravity and, therefore, is  measured in newtons in SI. Weight is measured using a spring  balance, calibrated in newtons.