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strojnjashka [21]
3 years ago
13

Magnesium is an alkaline earth metal with an atomic number of 12. It’s in the third row in the periodic table. Which expression

shows one way to find the number of valence electrons in one atom of magnesium? A. 12x3 B. 12/3 C. (12-8)-2 D. (12-2)+8 or E. (12+2)-8
Physics
2 answers:
Vikentia [17]3 years ago
7 0

Answer:

The answer is A.

Explanation: TRUST ME!

Ede4ka [16]3 years ago
6 0
The answer to your question would be A
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50°C is equivalent to a 82 F b- 90"F c 122"F
andre [41]

Answer:

50°C = 122 Fahrenheit

Explanation:

Here, we need to convert 50°C to F i.e. Fahrenheit. The conversion formula from degree Celsius to Fahrenheit is as follows :

^{\circ}F=(^{\circ}C\times \dfrac{9}{5})+32

Where, ^{\circ}C=50^{\circ}C

^{\circ}F=(50\times \dfrac{9}{5})+32

^{\circ}F=122^{\circ} F

So, 50 degree Celsius is equal to 122 degree Fahrenheit. Hence, this is the required solution.

6 0
3 years ago
A football coach walks 10 meters eastward and then 18 meters westward and then 22 metered East ward and finally 34 meters westwa
34kurt

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:  The official displacement formula is as follows: s = sf - si. s = displacement; si = initial position; sf = final position

magnitude is the quantitative value of seismic energy. It is a specific value having no relation with distance and direction of the epicentre.

the magnitude of a vector in any dimension. For a 2d vector the formula is [math]|z| = \sqrt{x^2+y^2}[/math], where x and y are the x and y components of the vector respectively.

7 0
3 years ago
Read 2 more answers
Both matter and energy can eneter and exit which of the following systems?
pochemuha
Both matter and energy can eneter and exit an <span>Open System only. A.</span>
3 0
3 years ago
Releasing the clutch pedal reapplies the clamping force and reconnects the engine and transmission by firmly clamping the clutch
Luden [163]

Answer:

Preassure plate

Explanation:

The flywheel, clutch disc, pressure plate, throw-out bearing clutch fork, and the pilot bearing are the components of a clutch. It works when the flywheel bolts onto the crankshaft and therefore the <em>pressure plate bolts back into the flywheel.</em>

I hope you find this information useful and interesting! Good luck!

8 0
3 years ago
What ocean depth would the volume of an aluminium sphere be reduced by 0.10%
yKpoI14uk [10]

Answer:

6400 m

Explanation:

You need to use the bulk modulus, K:

K = ρ dP/dρ

where ρ is density and P is pressure

Since ρ is changing by very little, we can say:

K ≈ ρ ΔP/Δρ

Therefore, solving for ΔP:

ΔP = K Δρ / ρ

We can calculate K from Young's modulus (E) and Poisson's ratio (ν):

K = E / (3 (1 - 2ν))

Substituting:

ΔP = E / (3 (1 - 2ν)) (Δρ / ρ)

Before compression:

ρ = m / V

After compression:

ρ+Δρ = m / (V - 0.001 V)

ρ+Δρ = m / (0.999 V)

ρ+Δρ = ρ / 0.999

1 + (Δρ/ρ) = 1 / 0.999

Δρ/ρ = (1 / 0.999) - 1

Δρ/ρ = 0.001 / 0.999

Given:

E = 69 GPa = 69×10⁹ Pa

ν = 0.32

ΔP = 69×10⁹ Pa / (3 (1 - 2×0.32)) (0.001/0.999)

ΔP = 64.0×10⁶ Pa

If we assume seawater density is constant at 1027 kg/m³, then:

ρgh = P

(1027 kg/m³) (9.81 m/s²) h = 64.0×10⁶ Pa

h = 6350 m

Rounded to two sig-figs, the ocean depth at which the sphere's volume is reduced by 0.10% is approximately 6400 m.

6 0
3 years ago
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