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4 years ago

Give me the definition of quantum physics

Physics

2 answers:

spayn [35]4 years ago

4 0

Answer:

Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.

Explanation:

Put it simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make matter and the forces with which they interact.

sorry if I'm wrong

liq [111]4 years ago

3 0

Answer:

Its the study of matter and energy on a more internal level.

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The area under the curve of a velocity vs time graph gives us what?

andriy [413]

The area under the curve of a velocity-time graph gives us the position of an object to find the object's displacement specifically.

Therefore, A: Position of an object is the correct answer.

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3 years ago

An instructor’s laser pointer produces a beam of light with a circular cross section of diameter 0.900 mm and a total power outp

il63 [147K]

Answer:

$E_0 = 2180.53N/C.$

$B_0 = 7.27*10^{-6}T.$

$U_{avg} = 4.2*10^{-5}J/m^3.$

Explanation:

The Intensity $I$ of the beam is

$I = P /A$

The diameter of the beam is 0.900mm; therefore, the area is

$A = \pi( \dfrac{0.900*10^{-3}}{2} )^2$

$A = 6.36*10^{-7}m^2$

and since $P = 4.00*10^{-3}W$ , the intensity of the beam is

$I = \dfrac{4.00*10^{-3}W}{6.36*10^{-7}m^2}$

$\boxed{I = 6289.3W/m^2.}$

Now, the intensity $I$ is related to $E_0$ by the relation

$I = \dfrac{E_0^2}{2\mu_0 c}$

solving for $E_0$ we get

$E_0 = \sqrt{2\mu_0 c I}$

putting in the numbers we get:

$E_0 = \sqrt{2(1.26*10^{-6}) (3*10^8) (6289.3)}$

$\boxed{E_0 = 2180.53N/C.}$

The amplitude of magnetic field $B_0$ is related to $E_0$ by

$B_0 = \dfrac{E_0}{c}$

putting in numerical values we get:

$B_0 = \dfrac{2180.53}{3*10^8}$

$\boxed{B_0 = 7.27*10^{-6}T. }$

The average energy density of the laser light is

$U_{avg} = \epsilon_0 E_0^2$

$U_{avg} = (8.85*10^{-12}) (2180.53)^2$

$\boxed{U_{avg} = 4.2*10^{-5}J/m^3.}$

8 0

4 years ago

HELP ASAP 70 POINTS BRAINLIST What type of symbiotic relationship is reflected between the Druid Wolfpack and the Elk in the Yel

DerKrebs [107]

Answer: they are both animals and they live near the yellow stone volcano so basically if the volcano erupts they'll be the first to die.

Explanation:

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3 years ago

paper by itself catches fire easily whereas a piece of paper wrapped around an alluminium pipe does not.

Julli [10]

Answer:

The paper does not catch fire when wrapped around aluminium pipe because aluminium absorbs the heat, so paper does not attain its ignition temperature.

Explanation:

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3 years ago

Technician A says that battery corrosion is commonly caused by spilled electrolyte. Technician B says that battery corrosion is

klio [65]

Answer:

B is correct

Explanation:

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Corrosion can be prevented by the addition of anti corrosion gel. It can also be removed by scrubbing the terminals with a hard brush

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4 years ago