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3 years ago

Light travels fastest when moving through

Physics

1 answer:

vitfil [10]3 years ago

4 0

A vaccum unlike sound,light can travel through any matter including a great vacuum of nothing (space)

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n 38 g rifle bullet traveling at 410 m/s buries itself in a 4.2 kg pendulum hanging on a 2.8 m long string, which makes the pend

Kitty [74]

Answer:

68cm

Explanation:

You can solve this problem by using the momentum conservation and energy conservation. By using the conservation of the momentum you get

$p_f=p_i\\mv_1+Mv_2=(m+M)v$

m: mass of the bullet

M: mass of the pendulum

v1: velocity of the bullet = 410m/s

v2: velocity of the pendulum =0m/s

v: velocity of both bullet ad pendulum joint

By replacing you can find v:

$(0.038kg)(410m/s)+0=(0.038kg+4.2kg)v\\\\v=3.67\frac{m}{s}$

this value of v is used as the velocity of the total kinetic energy of the block of pendulum and bullet. This energy equals the potential energy for the maximum height reached by the block:

$E_{fp}=E_{ki}\\\\(m+M)gh=\frac{1}{2}mv^2$

g: 9.8/s^2

h: height

By doing h the subject of the equation and replacing you obtain:

$(0.038kg+4.2kg)(9.8m/s^2)h=\frac{1}{2}(0.038kg+4.2kg)(3.67m/s)^2\\\\h=0.68m$

hence, the heigth is 68cm

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3 years ago

Which statement would be true about a water molecule if it has a linear shape

mihalych1998 [28]

It would be easily bond with other water molecules.

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3 years ago

Which type of bond will sulfer (S) and nitrogen (N) form?

otez555 [7]

Answer:

In ionic compounds, electrons are transferred between atoms of different elements ... For example, two hydrogen atoms bond covalently to form an H2 molecule; each ... is released when one mole of H2 molecules forms from two moles of H atoms: ... atom in each pair is more electronegative: (a) N or P. (b) N or Ge. (c) S or F.

Explanation:

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Which two particles are found in the center of an atom

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the two particles that are found in the center of an atom are protrons and neutrons.

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How condensation affects the temperature of the area where liquids forms

NISA [10]

Condensation does not effect the temperature of the area, condensation is the product the temperature difference between an object and the area it is in

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