The correct answer is A) more powerful than uranium.
Radium is more powerful than uranium.
Radium is part of our environment. It's part of nature, in small amounts. It is part of the alkaline-earth group and was discovered by Pierre and Marie Curie in 1898. Although is soft it has a lot of radiation. When it is exposed to air, it quickly oxidizes. It corrodes in water because it forms radium hydroxide.
Answer:
what is ionic? Is it iron
Explanation:
Force is equal to mass times acceleration. This means that the force applied to the object is 2 kg times 2.0 m/s, which gives you 4 Newtons.
Answer:
185.15 km/s
It is receding, that's a redshift
Explanation:
The radial velocity <em>V </em>of a star can be calculated by the formula:
V = c·Δλ/λ₀
Where c is the speed of light (3*10⁸m/s), Δλ is the wavelength shift (the difference between the wavelengths), and λ₀ is the wavelength that is not shifted (in this problem, 486.1 nm)
If we put the given data in the equation we're left with:
V =
V = 185147.09 m/s
<u>Converting the velocity to km/s:</u>
= 185.15 km/s
- Because the line of the star's spectrum appears at a wavelength greater than the wavelength measured in the laboratory, <u>the star is receding, this is called a redshift.</u>