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Mazyrski [523]
3 years ago
7

In your own words who discovered gadolinium

Physics
2 answers:
scoundrel [369]3 years ago
6 0

Answer:

Who Discovered Gadolinium Gadolinium was only discovered in 1880 by a Swiss chemist called Jean Charles Galissard de Marignac.

Explanation:

When analyzing samples of two minerals which contain small amounts of gadolinium, didymium and gadolinite, he discovered spectroscopic lines that were unrecognisable. Every single element has distinctive spectroscopic lines so he knew he had discovered a new element, and called it gadolinium after Finnish chemist Johan Gadolin.

77julia77 [94]3 years ago
3 0

Answer:

Paul-Émile Lecoq de Boisbaudran

Jean Charles Galissard de Marignac

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arsen [322]

magnetic field due to a finite straight conductor is given by

B = \frac{\mu_0 i}{4\pi r}(sin\theta_1 + sin\theta_2)

here since it forms an equilateral triangle so we will have

\theta_1 = \theta_2 = 60 degre

also the perpendicular distance of the point from the wire is

r = \frac{a}{2\sqrt3}

now from the above equation magnetic field due to one wire is given by

B = \frac{\mu_0 i}{4\pi \frac{a}{2\sqrt3}(sin60 + sin60)

B = \frac{\mu_0 i*2\sqrt3}{4\pi a}(\sqrt3)

B = \frac{3\mu_0 i}{2\pi a}

now since in equilateral triangle there are three such wires so net magnetic field will be

B = \frac{9\mu_0 i}{2\pi a}

5 0
4 years ago
As one moves up in altitude, the atmospheric pressure decreases. Suppose you hiked to the top of a mountain in Arizona at an alt
r-ruslan [8.4K]

Answer:

P_O_2=119.7\,mmHg

Explanation:

The composition of atmospheric air is approximately 78% nitrogen, 21% oxygen, 1% argon, and trace percentages of carbon dioxide, neon, methane, helium, krypton, hydrogen, xenon, ozone, nitrogen dioxide, iodine, carbon monoxide, and ammonia.

At sea level where the atmospheric pressure is known to be 760 mm Hg, the partial pressures of the various gases can be estimated to have partial pressures of approximately 593 mm Hg for nitrogen, 160 mm Hg for oxygen, and 7.6 mm Hg for argon.

However, these partial pressures are not accurate reflections of the partial pressures available because of the presence of water vapour and other suspended particulate matter.

Given:

Total pressure at the top of mountain, P=570\, mmHg

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P_O_2=570\times 0.21

P_O_2=119.7\,mmHg

8 0
4 years ago
The number of particles in a gas system inversely affects _____ and directly affects _____.
iragen [17]
The answer is A.
When a substance is a gas, it fills its container no matter how many particles it's made of, however the number of particles present will directly affect the pressure and temperature of the system.
5 0
3 years ago
To which group/family does each of these belong? A. Sulfur _________ B. Sodium _________ C. Argon _________ D. Silicon _________
ArbitrLikvidat [17]

Answer:

A. Sulfur _________ group 16 chalcogens

B. Sodium _________ group 1 alkali metals

C. Argon _________ group 18 noble gases

D. Silicon _________ group 14 carbon family

E. Chlorine _________ group 17 halogens

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7 0
2 years ago
A man weighing 680N and a woman weighing 500N have the same momentum. What is the ratio of the man's kinetic energy Km to that o
svet-max [94.6K]

Answer:

\dfrac{K_m}{K_w}=0.734

Explanation:

given,

weight of the man = 680 N

weight of the woman = 500 N

mass of man = \dfrac{680}{9.8}

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mass of woman

= \dfrac{500}{9.8}

M_w = 51 Kg

ratio of man's kinetic energy Km to that of the woman Kw

\dfrac{K_m}{K_w}=\dfrac{\dfrac{P_m^2}{2M_m}}{\dfrac{P_w^2}{2M_w}}

momentum is same

\dfrac{K_m}{K_w}=\dfrac{2M_w}{2M_m}

\dfrac{K_m}{K_w}=\dfrac{M_w}{M_m}

\dfrac{K_m}{K_w}=\dfrac{51}{69.4}

\dfrac{K_m}{K_w}=0.734

3 0
4 years ago
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