<u> Answers</u>
1. precision
2. density
3. control
4. matter
5. accuracy
6. gradation
<u>Explanation</u>
1. An indication of how close a measurement is to the correct result is called precision.
2. The mass of a substance per unit volume is called density of a substance.
3. A quantity in an experiment that remains unchanged or constant is called a control group.
4. Anything that has mass and occupies space is called matter.
5. The degree to which a measurement can be replicated is called accuracy.
6. Scale markings that denote equal units of measure is called gradation.
If Hydrogen has 1 electron it can only have 1 outer shell (or orbital) as an electron cannot by split across shells. In general, the first shell can hold 2 electrons, the second can hold 8. Consequently, hydrogen only has 1 outer shell as it has less than 2 electrons so it does not need another shell.
Angular momentum is the product of a moment of inertia and its angular velocity. It is defined to an object that is rotating.
Linear momentum is the product of a mass and its velocity where the velocity and the momentum are going to the same direction.
Angular momentum is normal to the motion while Linear momentum is parallel with the motion. Torque is needed to change an objects angular momentum while a force is needed to change and objects linear momentum.
Both angular and linear momentum depends on the mass and the velocity of the object.
Inertia is directly proportional to mass, thus when mass is increase with the same velocity, momentum increases. When mass is decreased, momentum also decreases.
