What is quantum mechanics

Physics

2 answers:

Nuetrik [128]3 years ago

8 0

Quantum mechanics is all to do with space and different planets

Jet001 [13]3 years ago

6 0

Deals with space & different planets .

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A light bulb emits light uniformly in all directions. The average emitted power is 150.0 W. At a distance of 5 m from the bulb,

beks73 [17]

Answer:

a) 0.477 W/m²

b) 13.407 N/C

c) 18.96 N/C

Explanation:

P = Power = 150 W

r = Distance = 5 m

ε₀ = Permittivity of space = 8.854×10⁻¹² F/m

a) Average intensity

$\bar{S}=\frac{P}{A}\\\Rightarrow \bar{S}=\frac{150}{4\pi r^2}\\\Rightarrow \bar{S}=\frac{150}{4\pi 5^2}\\\Rightarrow \bar{S}=0.477\ W/m^2$

∴ Average intensity is 0.477 W/m²

b) Rms value

$\bar{S}=c\epsilon_0E_{rms}^2\\\Rightarrow E_{rms}=\sqrt{\frac{\bar{S}}{c\epsilon_0}}\\\Rightarrow E_{rms}=\sqrt{\frac{\bar{0.477}}{3\times 10^8\times 8.854\times 10^{-12}}}\\\Rightarrow E_{rms}=13.407\ N/C$

∴ Rms value of the electric field is 13.407 N/C

c) Peak value

$E_0=\sqrt 2E_{rms}\\\Rightarrow E_0=\sqrt 2\times 13.407\\\Rightarrow E_0=18.96\ N/C$

∴ Peak value of the electric field is 18.96 N/C

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3 years ago

: Modeling Chemical Reactions

77julia77 [94]

Answer:

A Matter is not created or destroyed and the same amount of mass remains

Explanation:

In a chemical reaction, according to the law of conservation of matter, "matter is neither created nor destroyed and the same amount of mass remains in such a process".

New kinds of products are formed in a chemical reaction because they undergo chemical changes.
The chemical changes results in energy changes and formation of new kinds of substances.
Based on the law of conservation of matter, mass is constant.
Mass is not lost or gained.

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3 years ago

A 62.3 N force pulls an object at an angle of 9 = 22.0° to its direction of horizontal motion. It moves a

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W = F cos α . d

W = 62.3 cos 22 . 12.1

W = 698.94 J

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2 years ago

How dose storing waste underground can be effected by ground water in aquifers<br><br>

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Answer: