4 years ago

Which of the following elements is most likely to form a covalent bond?

Physics

2 answers:

DENIUS [597]4 years ago

7 0

A because it only has one electron in the outer shell.

babymother [125]4 years ago

5 0

A . K
Hope this helps!

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A uniform solid disk and a uniform hoop are placed side by side at the top of an incline of height h. If they are released from

tigry1 [53]

Answer:

The disk will reach the bottom first.

Explanation:

As we know:

change in kinetic energy = change in potential energy

ΔK.E = -ΔP.E

$\frac{1}{2} mv^{2} + \frac{1}{2}Iw^{2} = Mgh$

$Mv^{2} +I\frac{v^{2} }{R^{2} } = 2Mgh$

$v=\sqrt{\frac{2Mgh}{M+\frac{I}{R^{2} } } }$

For the disk:

$I=\frac{MR^{2} }{2}$

For Hoop:

$I=MR^{2}$

Hence

Velocity for the disk:

$v=\sqrt{\frac{4}{3}gh }$

Velocity for the Hoop:

$v=\sqrt{gh}$

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3 years ago

The rate at which work is done is ......,.....

Lana71 [14]

Answer:

Power

Explanation:

Power is the rate at which work is done

8 0

3 years ago

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A football is kicked vertically upward from a height of 2 feet with an initial speed of 70 feet per seconds.

posledela

All you need to do is plug in 3 for t:h=2+70(3)−16(3^2)
and the final answer is 68.

8 0

4 years ago

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What must be the diameter of a cylindrical 120-m long metal wire if its resistance is to be 6.0 ω? the resistivity of this metal

Free_Kalibri [48]

The resistance of the cylindrical wire is $R=\frac{\rho l}{A}$ .

Here $R$ is the resistance, $l$ is the length of the wire and $A$ is the area of cross section. Since the wire is cylindrical $A=\frac{\pi d^2}{4}$ . Rearranging the above equation,

$A=\frac{\rho l}{R}\\ \frac{\pi d^2}{4}=\frac{\rho l}{R}\\ d=\sqrt{\frac{4\rho l}{\pi R}}$

Here $l=120, R=6, \rho=1.68(10^{-8})$ .

Substituting numerical values,

$d=\sqrt{\frac{4(1.68)(10^{-8}) (120)}{\pi (6)}}\\ d=0.0006541$

Te diameter of the wire is $0.6541 mm$

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4 years ago

A velocity selector can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of th

Contact [7]

Answer:

C. 450v

Explanation:

Using

Voltage= B*distance of separation*velocity

3mm x 0.3T x 5E5m/s

= 450v

5 0

3 years ago