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Work function of a metal is the minimum amount of energy required to dislodge electron from the surface of the metal.
joseph rimiru answered the question on December 10, 2017 at 18:05
- A surface of metal whose work function is 6.4 x 10^-19 joules is illuminated with light of frequency 3.0 x 10^15 Hz. Find the maximum...(Solved)
A surface of metal whose work function is 6.4 x 10^-19 joules is illuminated with light of frequency 3.0 x 10^15 Hz. Find the maximum kinetic energy of the emitted photo electron. (use h = 6.51 x 10^-34)
Date posted: December 10, 2017. Answers (1)
- What is photoelectric effect?(Solved)
What is photoelectric effect?
Date posted: December 9, 2017. Answers (1)
- The work function of a certain material is 3.5 eV. Determine the threshold frequency for the material. (1 electron volt eV = 1.6 x...(Solved)
The work function of a certain material is 3.5 eV. Determine the threshold frequency for the material. (1 electron volt eV = 1.6 x 10^-19 J, and plank’s constant h = 6.62 x10^-34 Js )
Date posted: December 9, 2017. Answers (1)
- The minimum frequency of radiation needed to cause photoelectric effect on a certain metal surface is 9.05 x 10^14 Hz. Determine the work...(Solved)
The minimum frequency of radiation needed to cause photoelectric effect on a certain metal surface is 9.05 x 10^14 Hz. Determine the work function of the metal. (Plank’s constant h=6.63 x 10^-34 Js).
Date posted: December 9, 2017. Answers (1)
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How many milligram in one kilogram?
Date posted: December 9, 2017. Answers (1)
- State the advantages of lead acid accumulator over primary cell(Solved)
Advantages of lead acid accumulator over primary cell
Date posted: December 9, 2017. Answers (1)
- Give the applications of reflection of sound (Solved)
Give the applications of reflection of sound.
Date posted: December 9, 2017. Answers (1)
- The surface of a metal was struck by a light of certain wavelength. State what determine the maximum kinetic energy of the electron emitted.(Solved)
The surface of a metal was struck by a light of certain wavelength. State what determine the maximum kinetic energy of the electron emitted.
Date posted: December 7, 2017. Answers (1)
- Calculate the photon energy in ultra violet radiation whose frequency is 8.70 x 10^14 Hz. (Plank’s constant, h = 6.63 x 10^-34Js)(Solved)
Calculate the photon energy in ultra violet radiation whose frequency is 8.70 x 10^14 Hz. (Plank’s constant, h = 6.63 x 10^-34Js)
Date posted: December 7, 2017. Answers (1)
- The electrons are accelerated by a p.d. of 24000v in a given X-rays tube. Assuming all the energy goes to produce X-rays, determine the frequency...(Solved)
The electrons are accelerated by a p.d. of 24000v in a given X-rays tube. Assuming all the energy goes to produce X-rays, determine the frequency of the X-rays produced. {Plank’s constant h= 6.62 x 10^-(34) Js and the charge on an electron e = 1.6 X10^(-19)C}
Date posted: December 7, 2017. Answers (1)
- State common systems of unit as used in environmental soil physics(Solved)
State common systems of unit as used in environmental soil physics.
Date posted: December 7, 2017. Answers (1)
- Define soil water potential(Solved)
Define soil water potential.
Date posted: December 7, 2017. Answers (1)
- A stone is thrown in water at a distance of 6 m from a bank and produces 12 crests of waves which took 10 minutes...(Solved)
A stone is thrown in water at a distance of 6 m from a bank and produces 12 crests of waves which took 10 minutes to reach the bank.
Find the frequency of the wave.
Date posted: December 6, 2017. Answers (1)
- Define the term soil water potential as used in physics(Solved)
Define the term soil water potential as used in physics.
Date posted: December 6, 2017. Answers (1)
- The X-rays are used for detecting cracks inside metal beams (i) State the type of the x-rays used (ii) Give a reason for the above answer.(Solved)
The X-rays are used for detecting cracks inside metal beams.
i. State the type of the x-rays used.
ii. Give a reason for the above answer.
Date posted: December 5, 2017. Answers (1)
- If one increases the E.H.T. in the X-ray tube, state and explain what will happen to the X-rays produced.(Solved)
If one increases the E.H.T. in the X-ray tube, state and explain what will happen to the X-rays produced.
Date posted: December 5, 2017. Answers (1)
- How do you convert binary number to BCD.(Solved)
How do you convert binary number to BCD.
Date posted: December 5, 2017. Answers (1)
- How do you convert Binary Coded Decimal(BCD) to binary(Solved)
How do you convert Binary Coded Decimal(BCD) to binary.
Date posted: December 5, 2017. Answers (1)
- Briefly explain why rooms are at a lower level and ventilators at a higher level
(Solved)
Briefly explain why rooms are at a lower level and ventilators at a higher level
Date posted: December 5, 2017. Answers (1)
- Give the two differences between the cathode ray tube (CRT) of a T.V. and the cathode ray oscilloscope (CRO).(Solved)
Alternating current (a.c.) is used for transmitting electricity over long distance, state the reason.
Date posted: December 4, 2017. Answers (1)