An experiment gives the value of mass of the same object as 23.5 Kg in 1st attempt, 30 Kg in the second attempt, 25 kg in 3rd attempt. But the real mass of object is 28 Kg. Which of the following statement is correct about the experiment 1) experiment is precise
2) experiment is not precise

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?