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Leona [35]
3 years ago
7

What element behaves MOST like magnesium? A) S B) Si C) Sn D) Sr

Physics
2 answers:
Sedaia [141]3 years ago
8 0
The correct option is D.
Sr is the chemical symbol for strontium which is a group two element; it has atomic number of 38. Magnesium and strontium shared some similar properties because they both belong to the same group. Elements in the same group of the periodic table have similar characteristics, 
Gemiola [76]3 years ago
3 0

Answer:

D

Explanation:

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What is the moment of inertia of a 2.0 kg, 20-cm-diameter disk for rotation about an axis (a) through the center, and (b) throug
FinnZ [79.3K]

Answer:

(a) I=0.01 kg.m²

(b) I=0.03 kg.m²

Explanation:

Given data

Mass of disk M=2.0 kg

Diameter of disk d=20 cm=0.20 m

To Find

(a) Moment of inertia through the center of disk

(b) Moment of inertia through the edge of disk

Solution

For (a) Moment of inertia through the center of disk

Using the equation of moment  of Inertia

I=\frac{1}{2}MR^{2}\\  I=\frac{1}{2}(2.0kg)(0.20m/2)^{2}\\  I=0.01 kg m^{2}

For (b) Moment of inertia through the edge of disk

We can apply parallel axis theorem for calculating moment of inertia

I=(1/2)MR^{2}+MD\\ Here\\D=R\\I=(1/2)(2.0kg)(0.20m/2)^{2}+(2.0kg)(0.20m/2)^{2}\\  I=0.03kgm^{2}

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4 years ago
A circuit has a voltage drop of 27 Vacross a 30 2 resistor that carries a
Dmitry [639]

Answer:

A. 48.6 W

Explanation:

8 0
3 years ago
A wave has a velocity of 24 m/s and a period of 3.0 s. Calculate the wavelength of the wave.
Katyanochek1 [597]

Velocity (unit:m/s) of the wave is given with the formula:

v=f∧,

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f=1/T , where T is the period of the wave.

In our case: f=1/3

∧=v/f=24m/s/1/3=24*3=72m

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3 years ago
A car traveling at 25 m/s starts to decelerate steadily. It comes to a complete stop in 12 seconds. What is its acceleration?
never [62]
Assume it is in uniform deceleration.
u=25
v=0
s=x
a=?
t=12

v=u+at
0=25+a(12)
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decelerarion of 2.08 ms^(-2)/
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3 years ago
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Einstein developed much of his understanding of relativity through the use of gedanken, or thought, experiments.
Zielflug [23.3K]
True. Thought experiments are what he called them, it’s like meditation
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3 years ago
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