Find the radius using the centripetal acceleration formula: acceleration = 6.6 x 10^6 m/s^2 velocity = 2,000 rev/s

Using the periodic table entry below, match the phrases with their corresponding values.

Anika [276]

<u>Answer:</u>

For 1: Atomic number : 79

For 2. Atomic mass : 197

For 3. Number of orbits : 6

For 4. Number of neutrons : 118

For 5. Number of electrons in n=3 : 18

For 6. Number of valence electrons : 1

<u>Explanation:</u>

Atomic number is defined as the number of protons or electrons present in an atom. Here 79 corresponds to the Atomic Number.

Atomic mass is defined as the Sum of neutrons and protons present in an atom. Here, 197 corresponds to the Atomic Mass.

Atomic Mass = Number of protons + Number of neutrons

Here, Number of protons = 79

So, $197=\text{Number of Neutrons}+79\\\\\text{Number of neutrons}=118$

Valence electronic configuration of the atom having atomic number as 79 is : $[Xe]5d^{10}6s^1$

Number of orbit corresponds the higher value of 'n' which is the principle quantum number. Here, n = 6 so, number of orbits are also 6.

In orbit having n = 3, there are 3 sub-shells: s, p and d. The number of electrons that can be occupied in s-subshell = 2

The number of electrons that can be occupied in p-subshell = 6

The number of electrons that can be occupied in d-subshell = 10

Total number of electrons that can be occupied in orbit having n = 3 are (2 + 6 + 10) = 18 electrons.

From the electronic configuration, it is visible that valence electrons in atom having atomic number 79 is 1.

7 0

3 years ago

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In general it is best to conceptualize vectors as arrows in space, and then to make calculations with them using their component

JulijaS [17]

Answer:

The calculated vectors are:

$\vec{A}-\vec{B}=(3,-5,-4)$

$\vec{B}-\vec{C}=(-5,4,0)$

$-\vec{A}+\vec{B}-\vec{C}=(-6,4,3)$

$3\vec{A}-2\vec{C}=(-3,-2,-11)$

Explanation:

To operate with vectors, you sum or rest component to component. To multiply scalars with vectors, you distribute the scalar with each component of the vector. These are the following rules you must apply in these cases:

$\vec{V}+\vec{W}=(V_1,V_2,V_3)+(W_1,W_2,W_3)=(V_1+W_1,V_2+W_2,V_3+W_3)$ (1)

$\vec{V}-\vec{W}=(V_1,V_2,V_3)-(W_1,W_2,W_3)=(V_1-W_1,V_2-W_2,V_3-W_3)$ (2)

$\alpha\cdot\vec{V}=\alpha\cdot(V_1,V_2,V_3)=(\alpha\cdot V_1,\alpha\cdot V_2,\alpha\cdot V_3)$ (3)

The operations in these cases are:

$\vec{A}-\vec{B}=(1,0, -3)-(-2,5,1)=(3,-5,-4)$

$\vec{B}-\vec{C}=(-2,5,1)-(3,1,1)=(-5,4,0)$

$-\vec{A}+\vec{B}-\vec{C}=-(1,0, -3)+(-2,5,1)-(3,1,1)=(-6,4,3)$

$3\vec{A}-2\vec{C}=3(1,0, -3)-2(3,1,1)=(3,0, -9)-(6,2,2)=(-3,-2,-11)$

3 0

3 years ago

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An engineer wants to set up simple password protection with no usernames for some switches in a lab, for the purpose of keeping

Andre45 [30]

Answer:

A. A login vty mode subcommand

Explanation:

since we are protecting co-workers from connecting to the switches from their desktop PCs, we would need a Telnet line which is used to connect to devices remotely from other network devices on the same network segment as the device we want to connect to. A login local vty subcommand configures a local username for login access but since our design constraint is to configure without usernames, option A is the correct answer.

8 0

4 years ago

ASAP!!!!! What happen before mitosis occurs ?

BigorU [14]

I think it is D but im not sure

7 0

3 years ago

The captain told the passengers that the plane is flying at 450 miles per hour this information describes the plane

xz_007 [3.2K]

Speed, why velocity has direction acceleration Is a change in speed and it doesn't give a direction so it's speed

8 0

4 years ago

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