All categories

3 years ago

How does the photoelectric effect show that light has some properties of a stream of particles.

2 answers:

8 0

The photoelectric effect supports a particle theory of light in that it behaves like an elastic collision (one that conserves mechanical energy) between two particles, the photon of light and the electron of the metal.

BaLLatris [955]3 years ago

6 0

The photoelectric effect is the ability to knock electrons off of the atoms on the surface of a solid by shining a light at it. For some colors of light, it doesn’t matter how bright and intense the light is, no electrons separate from the solid. For other colors of light, it doesn’t matter how dim and weak the light is, electrons do separate from the solid. The dividing line between the colors that do and the colors that don’t is a certain wavelength of light, the one where each particle of light has at least enough energy to rio an electron away from an atom. If each particle of light has less energy than that, then no matter how many particles there are, they can’t separate electrons from their atoms. If each particle of light has more energy than that, than it doesn’t matter how few of them there are. A single particle can rip and electron away from the electron as it comes flying away from the surface.

You might be interested in

An organic compound is 61.5% C, 2.56% H and 35.9% N by mass. 2.00 grams of this gas is entered into a 300.0 mL flask and heated

pashok25 [27]

Answer:

C₄H₂N₂

Explanation:

First we calculate the moles of the gas, using PV=nRT:

P = 2670 torr ⇒ 2670/760 = 3.51 atm

V = 300 mL ⇒ 300/1000 = 0.3 L

T = 228 °C ⇒ 228 + 273.16 = 501.16 K

3.51 atm * 0.3 L = n * 0.082atm·L·mol⁻¹·K⁻¹ * 501.16 K

n = 0.0256 mol

Now we calculate the molar mass of the compound:

2.00 g / 0.0256 mol = 78 g/mol

Finally we use the percentages given to calculate the empirical formula:

C ⇒ 78 g/mol * 61.5/100 ÷ 12g/mol = 4

H ⇒ 78 g/mol * 2.56/100 ÷ 1g/mol = 2

N ⇒ 78 g/mol * 35.9/100 ÷ 14g/mol = 2

So the empirical formula is C₄H₂N₂

6 0

3 years ago

The kinetic molecular theory states that all particles of an ideal gas are

Marizza181 [45]

THE KINETIC MOLECULAR THEORY STATES THAT ALL PARTICLES OF AN IDEAL GAS ARE IN CONSTANT MOTION AND EXHIBITS PERFECT ELASTIC COLLISIONS.

Explanation:

An ideal gas is an imaginary gas whose behavior perfectly fits all the assumptions of the kinetic-molecular theory. In reality, gases are not ideal, but are very close to being so under most everyday conditions.

The kinetic-molecular theory as it applies to gases has five basic assumptions.

Gases consist of very large numbers of tiny spherical particles that are far apart from one another compared to their size.
Gas particles are in constant rapid motion in random directions.
Collisions between gas particles and between particles and the container walls are elastic collisions.
The average kinetic energy of gas particles is dependent upon the temperature of the gas.
There are no forces of attraction or repulsion between gas particles.

5 0

3 years ago

Murrr4er [49]

The answer fam is......... False

7 0

4 years ago

When molten candle wax solidifies is that a chemical reaction or not?l

andrey2020 [161]

Yes, when molten candle wax solidifies it is a chemical reaction

Explanation:

Basically Wax is crystalline so once the candle light melts it freezes taking back the solid state to the room temperature.

When the room temperature is below the freezing point, the liquid candle wax, turns into solid state again, therefore this process is called solidification. The process of freezing or solidification is a process when an object turns liquid and freezes back to solid state.

Indeed, Yes, when molten candle wax solidifies it is a chemical reaction

3 0

3 years ago

How is weight affected by gravity

Ira Lisetskai [31]

The higher levels of gravity put on an object the more weight the object has. For example someone who weighs say 100 lbs would weigh more if higher amounts of gravity would be applied to them. And less if less gravity was applied. But larger objects will automatically have more gravity applied to them than something smaller due to the gravitational pull needing to pull harder to keep the object to the planet's surface. Hope this helps! :)

7 0

3 years ago

Read 2 more answers