Q: 1. what phase of matter have particles close together but are not held rigidly? 2. what phase of…
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Q: Q5 -If the total energy of the electron in an orbit is positive, this means:
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Q: 6. Determine the radius of the event horizon if a star of mass 11 × 1030 kg explodes into a…
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Q: What are X-rays? How x-rays are produced? Why do we use x-rays to study crystal structure?
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Q: ____8. In radioactivity, as the nucleus of the atom gets smaller, the “strong force” inside becomes…
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Q: 4. Determine the Ix and ly for the z-section shown.
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Q: 1) What is a 'black-body'? 2) What is the characteristic of Black-body radiation? 3) What is the…
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A: Newton’s Law of gravitation is a universal law and clearly states the forces between the bodies…
Q: 1. In stimulated emission, an atom in an excited state can be induced to de-excite to a lower energy…
A: 1. When a photon of energy E=hυ is incident to a particle that are situated at the excited state…
Q: Q2: Calculate the electron velocity in the second orbit of the hydrogen atom?
A: Solution; To calculate the velocity of electron in 2nd orbit
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A: Given Data: Height of the tower, h=82.15 m Initial velocity, u=0 m/s g=-9.81 m/s2
Q: 1. What is the x component of A'? 2. What is the y component of A'? 3. What is the y component of B?
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Q: 6. Determine the radius of the event horizon if a star of mass 11 X kg explodés intó nova and…
A: mass of star = M = 11 X 1030 Kg radius of black hole = R = ? Universal gravitational constant = G =…
Q: 5-Calculate the energy of a photon in joules if its frequency is 3.2×10¹⁴ Hz
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Q: 1. Calculate the energy of a photon of a green light (K=0.52µm). (Convert the wavelength to…
A: λ=0.52 μm10-6 m1μm =5.2×10-7 m
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Q: 1. What are the two most abundant elements found in stars?
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A: Given: The wavelength of the light is 600 nm. The area (A) of the metal surface is 1 cm2. The…
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A: here we define escape velocity
Q: 4. Describe the following energy state transition for an electron in a hydrogen atom. List the…
A: the energy of an electron in the hydrogen atom is E=-13.6n2eV when an electron jumps from n2 to n1,…
Q: True or false? 1. Collisions in denser phases lead to shorter lifetimes and broader peaks. 2. The…
A: (1) collision in denser phases lead to shorter life times and broader peaks. It is true
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A: This question can be easily solved by applying the fundamental laws of electrostatics .
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Q: The Lorentz Force law is described as
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Q: 2. How many particles are present in a closed container if the energy it contains is 93523.83 J, and…
A: 1 amu = 1.67 × 10-27 kg Mass of oxygen gas = 32 amu = 32 × 1.67 × 10-27 kg = 53.44 × 10-27 kg…
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- 1. What is the volume of a tank that can hold 18 754 Kg of methanol whose density is 0.788g/cm³? Answer in kg/cm³ Answer in g/cm³ What is the correct significant figures i. ii. iii. 2. Choose if it's carbon, nitrogen or silicon. i. iii. iv. V. Which is the largest ionization energy? Carbon, nitrogen or Silicon? Which is the largest atomic size? Carbon, nitrogen or Silicon? Which is the least electron affinity? Carbon, nitrogen or Silicon? Which is the smallest electronegativity? Carbon, nitrogen or Silicon? Which is the most non-metallic element? Carbon, nitrogen or Silicon?A perfect black body has its surface temperature 27 cº Determine : Maximum radiation wavelength? Black body radiation intensity? The rate of energy released from 2m² Tungsten wire had its radiating surface area 8mm² and its temperature 2100K, considering that the wire is an ideal black body, Calculate the energy that the wire radiates in 10 minutes. Suppose the surface temperature of the Sun were about 12,000K, rather than 6000K. a. How much more thermal radiation would the Sun emit? b. What would happen to the Sun's wavelength of peak emission? c. Do you think it would still be possible to have life on Earth? Explain /A The energy radiated by a black body at 2300K is found to have the maximum at a wavelength 1260 nm, its emissive power being 8000W/m2. When the body is cooled to a temperature T K, the emissive power is found to decrease to 500W/m2. Find : (i) the temperature T k (ii) the wave length at which intensity of emission in maximum at the Te / Black body becomes yellow with λ…Direction: 1.Determine the number of electron,proton,and neutron in an atom, positive ions(cation)and negative ions(anion). 2. Draw the subatomic particles in proper location inside an atom/anion/cation. 3. Write your answer inside the box and use the symbol of electron, neutron and proton given below.
- 1. How much energy is required to heat 7.5 kg of ice from -30 oC to steam at 200 oC? Full and detailed solution. 2. A simple pendulum has a period of 1.0 s here on earth. What will be its period when taken to the moon, where the acceleration due to gravity is 1/6 that of earth?5. It is 5.0 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W). Which choice would burn up more energy, and how much energy (in joules) would it burn? Why is it that the more intense exercise actually burns up less energy than the less intense exercise?2. Can we Estimate the Solar Constant? A result from theoretical physics, known as the Stefan-Boltzmann law, states that the total power radiated by a blackbody at temperature T (K) per unit surface area is given by E=GT* where E is radiated power per unit surface area of the blackbody and o is the Stefan-Boltzmann constant equal to 5.67 x 10* Wm?K*. Let's assume that the sun is a perfect blackbody at T= 5783 K and apply the laws of energy conservation to estimate the average incidence of solar energy [W/m] arriving at the top of Earth's atmosphere (we call that incident energy the solar constant). Compare your calculated estimate of the solar constant to that commonly used to model the sun. Assuming the following constants: d = 1.39e9 m=Diameter of the sun de = 1.27e7 m = Diameter of the earth Res = 1.49el1 m = Mean earth-to-sun distance (HINT: use this distance as the radius of a sphere centered on the sun).
- 2. The wavelength of maximum intensity of the sun's radiation is observed to be near 500 nm. Assume the sun to be a black-body and calculate,imsed of (a) the sun's surface temperature (b) the power per unit area (intensity) emitted from he sun's surface. (c) At what rate is the sun losing mass in units of kg/s? (Hint: What are the units from rignslavaw wert odrai Jari W (d) your answer in part (b)?) (d) At that rate, how much time would it take to exhaust the sun's fuel supply? Does your answer seem reasonable? (The sun's mass is ~2.0x1030 kg)10. What is S/N ratio for a system that has a pressure of x psi and a sample standard deviation of Vx for 1/x observations? Simplify your answer to the lowest possible terms. For the above system, what is your sample standard deviation when S/N ratio = 5? (Use nominal the best choice for loss function)Q3. For a system at T = 300 K, what has to be the value of (ɛ - u) so that the distributions of Fermi- Dirac, Bose-Einstein, and Boltzmann agree to within 1%? Is this condition satisfied for gases in the atmosphere?
- Briefly explain Dulong-Petit, Einstein, and Debye's models for heat capacity. Draw a graph reflecting typical behavior of heat capacity versus temperature for a pure metal and discuss in which region which model is operative. Constants: Mass of electron: me=9.11x10-31 kg Charge of electron: e=1.6x10-19 C Boltzman's constant: kB=1.38X10-23 J/K, Planck's constant: h= 6.626x10-34 Js Pi: n=3.14 1eV=1.6x10-19 J2. Using the following form of the Maxwell-Boltzmann distribution function for speed, 32 mu? m f(v) = 4m exp 2rkT. 2kT show that (i) the root mean square velocity, Vrms is, 3kT Vrms = %3D m and (ii) the average velocity, vavy is, 8KT =True or false? 1. Collisions in denser phases lead to shorter lifetimes and broader peaks. 2. The Doppler effect can be minimized by increasing the temperature. 3. Resolving power increases with increasing D1.