Air pollution. Specifically the compounds sulfur dioxide and nitrogen oxide released from the burning of fossil fuels (source of air pollution), can find their way high into the atmosphere, where the compounds mix with with water, oxygen, and other chemicals to form more acidic pollutants (acid rain).
Answer:
The mass of Uranium present in a 1.2mg sample is ![4.8 \cdot 10^{-6}\,mg](https://tex.z-dn.net/?f=4.8%20%5Ccdot%2010%5E%7B-6%7D%5C%2Cmg)
Explanation:
The ration between Uranium mass and total sample mass is:
For a sample of mass 1.2 mg, the amount of uranium is:
![1.2\, mg \cdot \frac{1}{250000}=4.8 \cdot 10^{-6}\,mg](https://tex.z-dn.net/?f=1.2%5C%2C%20mg%20%5Ccdot%20%5Cfrac%7B1%7D%7B250000%7D%3D4.8%20%5Ccdot%2010%5E%7B-6%7D%5C%2Cmg)
Answer:
mass = 0.44 Kg
Explanation:
given,
Calories contain in the strawberry yogurt = 255 calories
1 Calorie = 4186 J
latent heat of vaporization = 2.42 x 10⁶ J/Kg
mass of perspiration = ?
Energy = 255 calories
Energy = 255 x 4186
= 1067430 J
Energy = mass x latent heat of vaporization
![mass = \dfrac{Q}{L_v}](https://tex.z-dn.net/?f=mass%20%3D%20%5Cdfrac%7BQ%7D%7BL_v%7D)
![mass = \dfrac{1067430}{2.42 \times 10^6}](https://tex.z-dn.net/?f=mass%20%3D%20%5Cdfrac%7B1067430%7D%7B2.42%20%5Ctimes%2010%5E6%7D)
mass = 0.44 Kg
B 10,000 - 30,000 K Blue-white stars
A 7,500 - 10,000 K White stars
F 6,000 - 7,500 K Yellow-white stars
G 5,000 - 6,000 K Yellow stars (like the Sun)
The lowest temperature stars are red while the hottest stars are blue. Astronomers are able to measure the temperatures of the surfaces of stars by comparing their spectra to the spectrum of a black body.
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia