(a)
Interpretation:
The power flux radiated by the Sun, in
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
(b)
Interpretation:
The total power emitted by the Sun, in watts, having surface area
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
(c)
Interpretation:
The number of joules of energy radiated in one year by the Sun is to be calculated.
Concept introduction:
The radiant energy is defined as the power per unit area. It is given by the expression as follows.
In the above equation,
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Chapter 9 Solutions
Student Solutions Manual for Ball's Physical Chemistry, 2nd
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- A cyclotron used to accelerate alpha-particles (m = 6.64×10−27kg, q = 3.2×10−19 C has a radius of 0.50 m and a magnetic field of 1.8 T. (a) What is the period of revolution of the alpha-particles? (b) What is their maximum kinetic energy?arrow_forwardDefine the terms in the expression: ln k = ln A – Ea/RTarrow_forwardAn electron in a hydrogen atom travels from energy level n = 2 to energy level n = 3. Would the electron be absorbing or emitting this energy in this transition? What is the change in energy (ΔE) for this transition? Show all work, including units and signs, and give your answer for ΔE to three significant figures.arrow_forward
- (c) The kinetic energy, Kr, of electrons emitted from a metal surface after irradiation with UV light of wavelength λ is given by: hc K₁=-=- where h is Planck's constant (6.626 x 10-4 Js), c is the speed of light in a vacuum (2.99 x 108 m s¹), and is the work function of the metal surface. In a specific experiment, light with a wavelength of 266 nm was used to irradiate a cadmium (Cd) metal surface. (i) Calculate the photon energy of the light used in the experiment, in Joules. (II) The work function for cadmium is 4.08 eV. Calculate the kinetic energy of the emitted electrons. [Note: 1 eV = 1.60 x 10-19 J.)arrow_forwardNonearrow_forward6.9 The average distance between Mars and Earth is about1.3 × 108miles. How long would it take video imagestransmitted from the Mars Spirit rover on Mars’ surfaceto reach Earth (1 mile = 1.61 km)?arrow_forward
- Calculate the kinetic energy in J of an electron moving at 6.00 × 106 m/s. The mass of an electron is 9.11 × 10-28 g.arrow_forwardW 4. (a) A laser emits light that has a frequency of 4.69 X 10¹4 s¹. What is the energy of one photon of this radiation? V (b) If the laser emits a pulse containing 5.0 X 1017 photons of this radiation, what is the total energy of that pulse? (c) If the laser emits 1.3 X 10-2 J of energy during a pulse, how many photons are emitted?arrow_forwardThe net change during photosynthesis involves CO2 and H2O forming glucose (C6H12O6) and O2. Chlorophyll absorbs light in the 600–700 nm region. (a) Write a balanced thermochemical equation for formation of 1.00 mol of glucose. (b) What is the minimum number of photons with λ = 680. nm needed to form 1.00 mol of glucose?arrow_forward
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