Answer:
When a buzzer is associated with some kind of circuit and one press the key then the completion of the circuit takes place. As a consequence, the current will begin to flow from the cell or the battery and moves towards the buzzer. Therefore, the sound is generated by the buzzer because of the flow of the electrical charge through it.
After going through the buzzer, the electric charges again moves towards the battery. Thus, the electric charges move in the complete circuit.
Answer:амьсгал боогдов гэж найдаж байна
Explanation:
Baking powder is used to increase the volume and lighten the texture of baked goods. It works by releasing carbon dioxide gas into a batter or dough through an acid–base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture.
Answer : The molar mass of the unknown gas will be 79.7 g/mol
Explanation : To solve this question we can use graham's law;
Now we can use nitrogen as the gas number 2, which travels faster than gas 1;
So, 167 / 99 = 1.687 So the nitrogen gas is 1.687 times faster that the unknown gas 1
We can compare the rates of both the gases;
So here, Rate of gas 2 / Rate of gas 1 =
Now, 1.687 = square root [ ]
When we square both the sides we get;
2.845 = (molar mass 1) / (28.01 g/mol N2)
On rearranging, we get,
2.845 X (28.01 g/mol N2) = Molar mass 1
So the molar mass of unknown gas will be = 79.7 g/mol
Significant figures are numbers that are higher than 0, and before the decimal.
For example:
12.0, there are only 2 significant figures: 1 and 2. Since 0 is not higher than itself and is after the decimal, it is not a significant figure. Trailing 0’s are not significant. Only zeros that are in between a number are considered significant.
For example: 302 has 3 significant figures.