True is the correct anwser
Answer: Explanation:
She can measure the volume and mass of the marble, the volume and mass of the water, and the volume and mass of the graduated cylinder. She can measure the volume and mass of the marble, the volume and mass of the water, and the mass of the graduated cylinder.
It probably does. I'm not 100% sure about it, but a thicker wire would increase the number of positive and negative charges in it.
Answer:
Option C.
The gravitational force between two objects is proportional to the product of their mass and inversely proportional to the distance between the two masses.
The formula of the gravitational force 
between two objects of mass 
and 
that are separated by a distance r is:
Where G is the gravitation constant.
You can see that as the masses increase, it also increases the gravitational force. But as the distance between the masses increases, the gravitational force decreases.
Therefore the correct option is the C "mass increases or distance decreases"
Answer:
Sapphire and diamond impurities change with their transparency and role of impurities in dielectrics is discussed below.
Explanation:
Temperature dependence of the dielectrics with different degrees of purity measured in the range of 233-313 K. This was observed that the impurities presence is strongly influences the dielectric constant, dipole moment and melting point.
SAPPHIRE
Sapphire is a very important gem stone. It's color is blue, but the naturally occurring sapphires have purple, yellow,orange and green. This variety in color is due to trace amount of presence of impurities like Iron,titanium, chromium, copper and Magnesium. It is the third hardest materials in the Mohs scale. The transparency of Sapphire is due to the impurities present in it.
DIAMOND
Diamond is the very precious stone. The transparency in the diamond is due to the band structure, that is the band gap is high in the diamonds, so they are transparent in nature. Diamond has many unequaled qualities and is very unique among the other minerals. It has highest refractive index of any natural minerals and is transparent over greatest number of wavelengths due to conduction present in it.
