Work function = hf0, where f is the frequency and h is the plank's constant,
but, f = c/λ , where c is the speed of light 2.998 ×10^8 m/s, and λ is the wavelength (290 nm) or 2.9 ×10^-7 M
Thus, f = (2.998 ×10^8)/(2.9×10^-7)
= 1.034 ×10^15 Hz
Therefore, Work function = (1.034×10^15)×(6.626 ×10^-34)
= 6.8513 × 10^-19 Joules
But, 1 mole = 6.022 ×10^23 particles
Therefore, 6.8513 ×10^-19 × 6.022×10^23
= 41.259 ×10^4 J/mol
but, 1 kJ = 1000 J
Therefore; 4.1259 ×10^2 kJ/mol
Answer:
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Explanation:
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You are given a fixed rate of 15.9 cm³/s. You are also given with the amount of volume in 237 cm³. Through the approach of dimensional analysis, you can manipulate through operations such that the end result of the units must be in seconds. The solution is as follows:
237 cm³ * (1 s/15.9 cm³) = 14.9 seconds
It essentially quadruples the energy.
Explanation if you’d like:
The energy transported by a wave is directly proportional to the square of the amplitude so. whatever change occurs in the amp, the square that affect infects energy. This means the doubling of the amplitude results in a quadrupling of the energy
Answer:
B)154 J
Explanation:
Mass of bowling ball=m=6.55kg
Height of bowling ball from ground=h=2.4m
Acceleration due to gravity=
We know that
Potential energy=mgh
Where m=Mass of object
g=Acceleration due to gravity
h=Height of object from ground
Substitute the values then we get
Potential energy=
Hence, the increase in the ball's potential energy=154J