Answer:
friction is when two objects tough with force basically. when an object is rubbed against something. when an object comes in contact with something else. or ig u can call it hot air rubbing off the inevitable force lol that works too , bud
whatever helps u rememeber
Answer:
As ice melts into water, kinetic energy is being added to the particles. This causes them to be 'excited' and they break the bonds that hold them together as a solid, resulting in a change of state: solid -> liquid.
Explanation:
As we may know, the change in state of an object is due to the change in the average kinetic energy of the particles.
This average kinetic energy is proportional to the temperature of the particles.
This is because heat is a form of energy; by adding energy to ice - heat, you "excite" the water molecules, breaking the interactions in the lattice structure and forming weaker, looser hydrogen-bonding interactions.
This causes the ice to melt. This is demonstrated in the image below.
More generally, when you remove energy - the object cools down, the particles move a lot slower. So slow, that they individually attract other molecules more than before, and this results in a physical change that also changes the state.
The correct answer is :
According to classical electrodynamics, light energy is a wave that is absorbed by atoms in a manner similar to how an object absorbs radiant heat. So, the atoms of a metal would absorb more energy the brighter the light was. It would be feasible for an electron in a metal to break free from its atoms if it received enough energy from the incoming wave. The more energy absorbed, the more energetic the metal's released electrons would be. Additionally, no electrons could conceivably be ejected until each atom had enough light energy. Light intensity was far more important than light frequency.
In many respects, the photo-electric effect contradicted this strategy:
- If the light was below a specific frequency, no matter how bright it was, no electrons were released. Increased light intensity increased the number of electrons that were released, but not their energy, if the light was above this frequency.
- Regardless of how weak the light was, electrons were nearly immediately emitted from the metal.
- Even though the intensity of the light was reduced, an increase in its frequency led to more energising electrons leaving the metal.
To learn more about photo-electric effect refer the link:
brainly.com/question/25630303
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Hey
SI unit for measure the amount of material contained in a solid sphere metre cube(m^3).
mean it have Volume .
Answer:
a) t = 3.2 10¹⁴ s
, b) Δm = 1,456 10⁻¹³ kg, mass decreases
Explanation:
In this exercise the removed electrons leave a positive charge on each disk, as the two charges are of the same sign they repel each other, so using Newton's equilibrium equation
–W = 0
F_{e} = W = mg
Electric force is
F_{e} = k q₁ q₂ / r²
Since the two generators remove 500 e/s, q₁ = q₂ = q
F_{e} = k q² / r²
k q² / r² = m g
q = √ m g r²/ k
q = √ (60 9.8 0.001² / 8.99 10⁹)
q = √ 6.54 10⁻⁴
q = 2.56 10⁻² C
This is the charge on each disk
q = # _electron e
# _electron = q / e
# _electron = 2.56 10⁻² / 1.6 10⁻¹⁹
# _electron = 1.6 10¹⁷ electrons
Let's use a rule of proportions to find the accumulation time, if the rate is 500 e/s
t = 1.6 10¹⁷ 1/500
t = 3.2 10¹⁴ s
b) how electrons are losing their mass decreases
Δm = me # _electron
Δm = 9.1 10⁻³¹ 1.6 10¹⁷
Δm = 1,456 10⁻¹³ kg