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2 years ago

It is essential to behave appropriately on social media and be _______ when you post anything.

Physics

1 answer:

Firdavs [7]2 years ago

5 0

Answer:

I would say be Mindful.

Explanation:

There could be like a MILLION answers for this. I think that you should personally go with your gut. That would be the best option. I think it's mindful because you really do have to be mindful when you post. Like not posting too much, not posting stuff you're uncomfortable with, not posting when on vacation, etc. So, I think you should be mindful.

You might be interested in

There is a basketball with a diameter of 9in. and a softball with a diameter of 4in. Find how many times greater the volume of t

erica [24]

Answer: #.37 times greater

Explanation: Volume of a sphere is: V = $\frac{4}{3}$ ·π·r³

Since it is given the diameter of the basketball and the softball, their ratios are r₁ = 3in and r₂ = 2in, in which index 1 represents the basketball and index 2, the softball.

Calculating the volume of basketball:

V₁ = $\frac{4}{3}$ . 3.14 . 3³

V₁ = 113.04 in³

Calculating the volume of softball:

V₂ = $\frac{4}{3}$ . 3.14 . 2³

V₂ = 33.5 in³

Comparing one volume with the other:

$\frac{V1}{V2}$ = $\frac{113.04}{33.5}$ = 3.37

We have that V₁ = 3.37V₂

This means the volume of a basketball is 3.37 times greater than the volume of a softball.

4 0

3 years ago

Read 2 more answers

A portable electric heater has a resistance of 10 ohms. It plugs into a wall outlet that is 120 V. How much current, in amps, do

skad [1K]

Answer:

12 A

Explanation:

I = V/R = 120 V/ 10 Ohm = 12 A

5 0

4 years ago

The emission of electrons from metals that have absorbed photons is called the

valina [46]

Answer:

The answer to your question is the Photoelectric effect.

Explanation:

4 0

2 years ago

Pions have a half-life of 1.8 x 10^-8 s. A pion beam leaves an accelerator at a speed of 0.8c. What is the expected distance ove

Nuetrik [128]

Answer:

the expected distance is 4.32 m

Explanation:

given data

half life time = 1.8 × $10^{-8}$ s

speed = 0.8 c = 0.8 × 3 × $10^{8}$

to find out

expected distance over

solution

we know c is speed of light in air is 3 × $10^{8}$ m/s

we calculate expected distance by given formula that is

expected distance = half life time × speed .........1

put here all these value

expected distance = half life time × speed

expected distance = 1.8 × $10^{-8}$ × 0.8 × 3 × $10^{8}$

expected distance = 4.32

so the expected distance is 4.32 m

5 0

3 years ago

What is the maximum kinetic energy (in eV) of a photoelectron when a surface, whose work function is 5.0 eV, is illuminated by p

Aleksandr [31]

Answer: -1.898 ev (this means the photoelectric effect cannot occur)

Explanation:

The photoelectric effect consists of the emission of electrons (electric current) that occurs when light falls on a metal surface under certain conditions.

If the light is a stream of photons and each of them has energy, this energy is able to pull an electron out of the crystalline lattice of the metal and communicate, in addition, a kinetic energy.

This is what Einstein proposed:

Light behaves like a stream of particles called photons with an energy

$E=h.\nu$ (1)

So, the energy $E$ of the incident photon must be equal to the sum of the Work function $\Phi$ of the metal and the kinetic energy $K$ of the photoelectron:

$E=\Phi+K$ (2)

Where $\Phi$ is the minimum amount of energy required to induce the photoemission of electrons from the surface of a metal, and its value depends on the surface.

In this case $\Phi=5 eV$

So, applying equation (1) in this problem:

$E=h \nu$

Where:

$h=4.136(10)^{-15}eV.s$ is the Planck constant

$\nu$ is the frequency

Now, the frequency has an inverse relation with the wavelength $\lambda=400(10)^{-9}m$ :

$\nu=\frac{c}{\lambda}$ (3) Being $c=3(10)^{8}m/s$ is the speed of light in vacuum

$\nu=\frac{3(10)^{8} m/s}{400(10)^{-9}m}$ (4)

$\nu=7.5(10)^{14} Hz$ (5)

Substituting (5) in (1):

$E=(4.136(10)^{-15}eV.s)(7.5(10)^{14} Hz)$ (6)

$E=3.102 eV$ (7)

Now, substituting (7) in (2):

$3.102 eV=5 eV+K$ (8)

Finding $K$ :

$K=-1.898 eV$ (9) Since a negative kinetic energy is not physically possible, the only explanation is: the conditions for a photoelectric effect were not met, hence the photoelectric effect cannot occur.

To understand it better:

The main condition for the occurrence of the photoelectric effect is that the energy incident photon $E$ must be greater than the work function $\Phi$

$E>\Phi$

If $E$ (as in this situation) photoelectric effect cannot occur.

6 0

3 years ago