In vacuum and empty space, it's 299,792,458 meters per second
(186,282.4 miles per second).
In any material stuff, it's somewhat less. How much less depends on
what stuff it is ... it's different in each material "medium".
Answer:
Crystallization is defined as a process by which a chemical is converted from a liquid solution into a solid crystalline state.
8. The answer is C
9. Sorry I don't know
Answer: option 1. thermal expansion and contraction.
The thermostat uses the thermal expansion and contraction of metals: when the metal expands it acts as a switch, a coiled ribbon expands and the electric circuit is off, then the current stops. When the temperatures decrease, the coiled ribbon contracts and the circuit is on, then the current starts to flow and the resistance starts to radiate heat.
Answer:
a)
b)
Explanation:
We are comparing two wavelengths with the radius and diameter constant, and if we want to compare it, we need to use the following formula:
Where represent the angular resolution and the wavelength.
So if we have a fixed resolution and wavelength 1 and we want to find the resolution for a new condition we can solve for and we got
Part a
For this case the subindex 1 is for the color red and we know that:
And the angular resolution for the color red is specified as
And for the infrared case we know that , so if we replace we got:
Part b
For this case the subindex 1 is for the color red and we know that:
And the angular resolution for the color red is specified as
And for the ultraviolet case we know that , so if we replace we got: