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Murrr4er [49]
3 years ago
7

Atoms and elements are the basic backbone of the universe . Explain what this statement means and how the idea of the atom has c

hanged overtime
Physics
1 answer:
kirill [66]3 years ago
4 0
The protons, neutrons and electrons in an atom, also called as the "baryonic matter" is what astrophysicists think that the universe is made of. The idea of the structure of the atom has changed over time from Daltons model, to Rutherford's, and Neils Bohr's planetary model, and finally to the quantum model of an atom.
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What is Archimedes principle?​
trasher [3.6K]

Archimedes' principle states that a body immersed in a fluid is subjected to an upwards force equal to the weight of the displaced fluid. This is a first condition of equilibrium. We consider that the above force, called force of buoyancy, is located in the centre of the submerged hull that we call centre of buoyancy.

6 0
3 years ago
The distance between the first and fifth minima of a single-slit diffraction pattern is 0.500 mm with the screen 37.0 cm away fr
WARRIOR [948]
In the single-slit experiment, the displacement of the minima of the diffraction pattern on the screen is given by
y_n= \frac{n \lambda D}{a} (1)
where
n is the order of the minimum
y is the displacement of the nth-minimum from the center of the diffraction pattern
\lambda is the light's wavelength
D is the distance of the screen from the slit
a is the width of the slit

In our problem, 
D=37.0 cm=0.37 m
\lambda=530 nm=5.3 \cdot 10^{-7} m
while the distance between the first and the fifth minima is
y_5-y_1 = 0.500 mm=0.5 \cdot 10^{-3} m (2)

If we use the formula to rewrite y_5, y_1, eq.(2) becomes
\frac{5 \lambda D}{a} - \frac{1 \lambda D}{a} =\frac{4 \lambda D}{a}= 0.5 \cdot 10^{-3} m
Which we can solve to find a, the width of the slit:
a= \frac{4 \lambda D}{0.5 \cdot 10^{-3} m}= \frac{4 (5.3 \cdot 10^{-7} m)(0.37 m)}{0.5 \cdot 10^{-3} m}=  1.57 \cdot 10^{-3} m=1.57 mm

7 0
4 years ago
Look at the graph below. Which elements together make up seven percent of the Earth’s crust? calcium and iron calcium and sodium
DedPeter [7]
B. Calcium and Sodium 
Hope this helps :)
3 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!!!!!!!
Ray Of Light [21]

Answer:

I believe C

Explanation:

i never learned this sorry

5 0
3 years ago
Read 2 more answers
Critical Thinking
Sophie [7]
OK.

You're sitting in a soft comfy chair, reading a book in your lap.
The book stays put, and you eventually start to get sleepy, because
there's almost no acceleration happening.

The chair you're sitting in is seat #27B in a huge jet taking you to visit
your grandparents who live a thousand miles away.
The airplane is maybe 7 miles up, passing over the ground at nearly
500 miles per hour, flying straight, level, and fast !
6 0
3 years ago
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