<span>Which part of the electromagnetic spectrum has a higher frequency than ultraviolet light? </span>B. Gamma Rays.
Answer:
Aquifer
Explanation:
Instead of snowcapped mountains that store water in advance of warmer temperatures, most of our drinking water comes from underground "mountains" of porous materials called aquifers which are replenished by rain. The Biscayne Aquifer is South Florida's lower east coast's primary source of fresh water.
The hydrogen bonds is an intermolecular force.
This is, it is an atracction among molecules, which trends to keep the molecules close one to each other quite strongly.
Vaporization is the pass from liquid, where the molecules are pretty close one to each other, to gas, where the molecules are more distant from each other. To reach that separation of the molecules, the strong hydrogen bonds must be overcome, which means a higher energy requirement than in similar compounds without hydrogen bonds.
That is reflected in high values for the enthalpy of vaporization in the compounds with hydrogen bonds (like hydrogen halides).
So, that leads to the option D. of the list of answers. enthalpy heat of vaporization gives the best indication of the relative strenght of hydrogen bonds.
<h3>
Answer:</h3>
1.6 × 10^2 teragrams
<h3>
Explanation:</h3>
- Density is the ratio of the mass of object to its volume.
Density = Mass ÷ Volume
we are given;
Density of a black hole = 6×10^15 kg/m³
Volume of the black hole = 2.5 in or 6.35 cm in volume
But; 1 g/cm³ = 1000 kg/m³
Therefore; 6×10^15 kg/m³ =6×10^12 g/cm³
We are required to get mass;
Volume = 4/3(πR³)
Assuming the radius is 2.5 inches or 6.35 cm
= 4/3 × 3.14 × 6.35 ³
= 26.585 cm³
But; Mass = Density × volume
= 6×10^12 g/cm³ × 26.585 cm³
= 1.6 × 10^14 g
but; 1 telegram = 1 teragram = 10^12 g
Therefore; 1.6 × 10^14 g ÷10^12 g
= 1.6 × 10^2 teragrams
Therefore, the mass of the black hole is 1.6 × 10^2 teragrams