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3 years ago

What is the term for the pattern of spiral impressions inside a handgun?

Physics

2 answers:

Tomtit [17]3 years ago

8 0

The correct choice is

A) rifling

Rifling is a pattern of sequence of raised and recessed portions. These raised portions are known as lands and recessed portions as grooves. these lands and grooves helps in providing spin to the bullet as it is fired. This spin makes the bullet to penetrate deeper into the target and cause severe damage.

Korolek [52]3 years ago

4 0

It's called rifling, to stabilise the bullet.

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A boy runs at a speed of 3.3 m/s straight off the end of a diving board that is 3 meters above the water. How long is he airborn

svp [43]

Answer:

Explanation:

7 0

3 years ago

A mass on a spring oscillates with a period T. Part A If both the mass and the force constant of the spring are doubled, the new

garik1379 [7]

Answer:

The new time period will be T.

Explanation:

The time period in terms of spring constant and mass is given by :

$T=2\pi\sqrt{\dfrac{m}{k}}$

If mass and force constant is doubled, m' = 2m and k' = 2k

New time period is given by :

$T'=2\pi\sqrt{\dfrac{m'}{k'}}$

$T'=2\pi\sqrt{\dfrac{2m}{2k}}$

$T'=2\pi\sqrt{\dfrac{m}{k}}$

$T'=T$

So, the new period will remains the same. Hence, the correct option is (C).

4 0

3 years ago

Consider a one-dimensional crystal (similar to a carbon nanowire) with length 10 um and lattice spacing 0.1 nm.

Finger [1]

Answer:

a) Fermi level = 600 electron-volts

b) $\frac{2.04 * 10^{13} }{\sqrt{E} }$

Explanation:

Given data:

length of one-dimensional crystal = 10 um

Lattice spacing = 0.1 nm

A) Determine the Fermi level assuming one electron per atom

Total length = 10 <em>u</em>m

Interatomic separation of a = 0.1 nm

in this case the Atom has one electron therefore the number of electrons = 10^5 and the number of states Ns = gsN = 2 * 10^5 ( attached below is some part of the solution )

hence : Fermi level = 600 electron-volts

B) Determine the density of states as a function of electron energy

attached below is the detailed solution