I think it’s C but anybody can correct me if I’m wrong
The answer is most definitely “A”
Answer: the line Spectra of hydrogen lies between the ultra-violet, visible light and infra-red of the electro magnetic spectrum
Explanation:
Electromagnetic radiation spans an wide range of wavelengths and frequencies. This range is called the electromagnetic spectrum. The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The 7 regions includes; radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.
lower-energy radiation, such as radio waves, is expressed as frequency while microwaves, infrared, visible and UV light are usually expressed as wavelength and finally, higher-energy radiation such as X-rays and gamma rays, is expressed in terms of energy per photon.
Therefore, hydrogen lies between the ultra-violet, visible light and infra-red region of the electro magnetic spectrum.
Answer:
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains. ... That means a white dwarf is 200,000 times as dense.
Explanation:
they are cold
they are about the size of Earth
these both are not true
Answer:
B,D
Explanation:
In December, a city in the Southern Hemisphere has warm weather all month long.
What causes this to happen?
The city experiences fewer hours of daylight.
The city is experiencing a winter solstice.
There is a high concentration of the Sun’s rays in that region.
The Sun reaches its highest point in the sky during this month.In December, a city in the Southern Hemisphere has warm weather all month long.
What causes this to happen?
The city experiences fewer hours of daylight.
The city is experiencing a winter solstice.
There is a high concentration of the Sun’s rays in that region.
The Sun reaches its highest point in the sky during this month.
