Answer:
h f = W + KE
Input energy equals work function plus KE of emitted electron
W = 6.63E-34 * 2.5E15 - 6.3 * 1.6E-19
W = 6.63 * 2.5 * 10^-19 - 10.1 * E-19 ev (1ev = 1.6E-19 J)
W = (16.6 - 10.1)E-19 = 6.5E-19 J
h f = 6.5E-19 J for electrons to be emitted with zero KE
f = 6.5E-19 / 6.63E-34 = .98E-15 / sec = 9.8E-14 / sec (threshold)
Answer:
a liquid is increased by 48.5 degrees Celsius, it expands by 0.0920 m^3. Explanation:
It's A.Gas molecules moving more quickly..... hope it helps you dear
Explanation:
Gamma rays, X-rays and ultraviolet rays from sun cause a lot of damage to the living beings on Earth. The atmosphere on the Earth protects us from these harmful rays. The ozone layer protects us from ultraviolet rays from the sun which can cause plants to die and skin cancer in humans.
