Answer:
Explanation:
Based on the wave model of light, physicists predicted that increasing light amplitude would increase the kinetic energy of emitted photoelectrons, while increasing the frequency would increase measured current.
Contrary to the predictions, experiments showed that increasing the light frequency increased the kinetic energy of the photoelectrons, and increasing the light amplitude increased the current.
Based on these findings, Einstein proposed that light behaved like a stream of particles called photons with an energy of \text{E}=h\nuE=hνstart text, E, end text, equals, h, \nu.
The work function, \PhiΦ\Phi, is the minimum amount of energy required to induce photoemission of electrons from a metal surface, and the value of \PhiΦ\Phi depends on the metal.
The energy of the incident photon must be equal to the sum of the metal's work function and the photoelectron kinetic energy:
Answer:
The temperature of an object increases when the molecules that make up that object move faster. Thermal energy is energy possessed by an object or system due to the movement of particles within the object or the system.
Answer:
the hydrogen filled balloon is denser than the air filled balloon
Answer:
The letter B is the letter that represents the location of the resister in the diagram.
Explanation:
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Answer:
The time for the entire race is 11.39 sec.
Explanation:
Given that,
Distance = 15 m
Remainder distance = 100 m
Suppose A sprinter begins a race with an acceleration of 3.4 m/s².
We need to calculate the time
Using equation of motion

Put the value in the equation



We need to calculate the final velocity of sprinter
Using equation of motion again

Put the value into the formula


We need to calculate the distance covers by sprinter

The sprinter need to covers only 85 m.
We need to calculate the time
Using formula of time

Put the value into the formula


We need to calculate the time for the entire race

Put the value into the formula


Hence, The time for the entire race is 11.39 sec.