The best and most correct answer among the choices provided by your question is the first choice or letter A.
<span> Astronomers' ever-expanding knowledge of the universe has coincided with the development of the cosmic distance scale, a collection of indirect distance measurement.</span>
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8) the energy released by fusion is generally 3 to 4 times larger than with fission. Fission has very few by-products but fusion releases large amounts of radioactive particles because it starts with large nuclei.
9) Alpha particles are 2 protons and 2 neutrons all put together. It's really the nucleus of a helium atom. It is most dangerous if you ingest it but it can be stopped with a sheet of paper so outside the body it's not as dangerous as others and due to its size it can't get very far in the air before hitting air molecules
beta particles are high energy electrons or positrons. They travel further due to their small size but can be stopped by a thin barrier of plastic or wood.
Gamma rays are high frequency photons (light) They are stopped by metal plates and go through human tissue. They are quite dangerous.
10) The mass that is lost in chemical reactions is very small. Solve E=mc² for mass and you get m=E/c². This says the mass you lose is equal to the energy you gained divided by the speed of light squared. c² is a VERY big number so you need a lot of energy produced to notice it. Chemical reactions are simply too inefficient to get that much energy out.
11)You need high temperatures for fusion because you're trying to push two atoms together (to "fuse" them as the name suggests) The electrons in one atom repel the other electrons in the other atoms. When stripped down to only protons, you still have to overcome this repulsion (Coulomb repulsion). High temperatures means high velocity of the particles in the plasma. This gives them enough "oomph" to get close enough to fuse. Once close enough to each other, the nuclear force takes over and overwhelms the Coulomb repulsion and the nuclei fuse and release energy in doing so.
Continuing education opportunities allow adults to improve their skills, complete their education and also to change careers.
Answer: Option D
<u>Explanation:
</u>
As we continue our education for higher studies we can learn new things. We can improve our skills by going for higher studies. Some people have a break in their education and they can also continue their education after sometime to complete their course.
So, it helps them to cater their needs and enhance their knowledge. Also when we go for higher studies, we get to know other things about the subject and can try for different career choices. Also, we can even change our ongoing career if we go for higher education and find some other career more interesting and profitable than the existing ones.
Answer:
constructive λ = 130 m
destructive λ = 260 m
Explanation:
a) the expression for constructive interference is that the difference in amino is equal to a multiple of the average wavelength
AQ - BQ = 2m λ/ 2 m = 0, 1, 2, ...
Where
AQ = 130 +50 = 180 m
BQ = 50 m
To find the smallest wavelength let's use m = 1
180 - 50 = 2 1 λ/ 2
λ = 130 m
b) for destructive interference
AQ –BQ = (2m + 1) λ/2
The smallest value is for m = 0
130 = λ / 2
λ = 260 m
Answer:
563712.04903 Pa
Explanation:
m = Mass of material = 3.3 kg
r = Radius of sphere = 1.25 m
v = Volume of balloon = 
M = Molar mass of helium = 
= Density of surrounding air = 
R = Gas constant = 8.314 J/mol K
T = Temperature = 345 K
Weight of balloon + Weight of helium = Weight of air displaced
Mass of helium is 6.4356 kg
Moles of helium
Ideal gas law
The absolute pressure of the Helium gas is 563712.04903 Pa
