Concept explainers
(a)
The radius of the hemisphere.
(a)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the total mass is,
Here,
Substitute
The formula to calculate the mass of the hemisphere is,
Here,
Substitute
Conclusion:
Therefore, the radius of the hemisphere is
(b)
The area of the curved surface.
(b)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the area is,
Substitute
Conclusion:
Therefore, the area of the curved surface is
(c)
The power emitted by the cats.
(c)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the power emitted is,
Here,
Substitute
Conclusion:
Therefore, the power emitted by the cats is
(d)
The intensity of radiation at the surface.
(d)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the intensity of radiation is,
Substitute
Conclusion:
Therefore, the intensity of radiation at the surface is
(e)
The amplitude of electric field in the electromagnetic wave.
(e)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the amplitude of the electric field is,
Here,
Substitute
Thus, the amplitude of electric field in the electromagnetic wave is
Conclusion:
Therefore, the amplitude of electric field in the electromagnetic wave is
(f)
The amplitude of magnetic field in the electromagnetic wave.
(f)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the amplitude of the magnetic field is,
Substitute
Conclusion:
Therefore, the amplitude of magnetic field in the electromagnetic wave is
(g)
The total power radiated by the family of cat.
(g)
Answer to Problem 34.73AP
Explanation of Solution
Given info: The weight of the black cat is
Explanation:
The formula to calculate the mass of the hemisphere is,
Here,
Substitute
The formula to calculate the power radiated by the kittens is,
Here,
Substitute
The formula to calculate the mass of the hemisphere is,
Here,
Substitute
The formula to calculate the power radiated by the cat is,
Here,
Substitute
The formula to calculate the total power radiated by the family of cat is,
Substitute
Conclusion:
Therefore, the total power radiated by the family of cat is
Want to see more full solutions like this?
Chapter 34 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
- The settling rate of particulates in the air follows Stokes' law. If particulates of diameter of 10 nm emitted in the atmosphere are found to settle out after 2 days, how long would it take particulates of the same material with a diameter of 5 nm to settle out if they are emitted from the same source?arrow_forward(a) Taking A = (6.00 î – 8.00 j) units, B = (-8,00 Î + 3.00 j) units, and C = (26.0 î + 19.0 ĵ) units, determine a and b such that a à + b B + T = 0. (b) A student has learned that a single equation cannot be Figure P22 solved to determine values for more than one unknown in it. How would you explain to him that both a and b can be determined from the single equation used in part (a)?arrow_forwardPd Pd 1. Let's consider a toy model of nuclear fission. Suppose an nucleus of Uranium-235 (92 protons, molar weight of 235 g/mole) "splits" into two "daughter" nuclei of Palladium (46 protons each) – this is not how it really happens, but it's a very simple model that actually gives fairly accurate results. The radius of the original U-235 nucleus is about 7.4 x 10-15 m. (a) If the Pd nuclei each have half the volume of the U nucleus, which is reasonable, and they are "touching" right after the split, how far apart are their centers? (b) Using conservation of energy, what will be the sum of the kinetic energies of the Pd nuclei when they are far apart from each other? (c) That's energy of one atom undergoing fission, so what, then, is the energy released by the fission of 1 kg of U-235? Express this in Joules and also in kilotons of TNT, where 1 kt = 4.2x1012 J. (The Hiroshima bomb yielded about 15 kt) (d) How many kwh (kilowatt-hours) of energy is this, (1 kwh = 3.6x10° J), and (if…arrow_forward
- The number of atoms diffusing through a membrane with an area of 4 cm? is 6.16×1013 atoms/sec (based on the definition of flux =M/A.t). Concentration gradient (Ac/ A x) for diffusing atoms with D=9×10- 12 cm?/sec becomes. Note: J = - D(Ac/ A x) -1.71×1023 -1.71×1024 -1.71×1022 -1.71×1024arrow_forwardThe density of gold is 19.32g/cm^3. Do dimensional analysis to figure out how you can approximate the surface density of gold in atoms cm^−2.arrow_forwardAuroras are caused by collisions between particles such as electrons released by the Sun, and atoms in a planet’s atmosphere. These collisions transfer energy to the atmospheric atoms causing them to emit specific colors (wavelengths) of light. On Earth, auroras occur in a layer of the atmosphere known as the ionosphere, 80 km to 400 km above the surface. If solar activity increases, the number of sunspots increases, and more particles are released by the Sun. If, on average, there were 150 sunspots in 2014, 5 in 2020, and 160 in 2023, which year(s) will have the most auroras, and which year(s) the least? Can you explain why? Answer:arrow_forward
- e −iπ/4arrow_forward> In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Assume that the person is wearing only a skimpy bathing suit of negligible area. As a rough approximation, the area of a human body may be considered to be that of the sides of a cylinder of length L = 2.0 m and circumference C = 0.8 m. For the Stefan-Boltzmann constant use o= 5.67 x 10-8 W/m²/K4 Part C Now calculate Por, the thermal power absorbed by the person from the thermal radiation field in the room, which is assumed to be at Troom = 20°C. If you do not understand the role played by the emissivities of room and person, be sure to open the hint on that topic. Express the thermal power numerically, giving your answer to the nearest 10 W. View Available Hint(s) Por= Submit Part D [-] ΑΣΦ. Pnet = 17] ΑΣΦ Find Paet, the net power radiated by the person when in a room with temperature Troom= 20°C. Express the net radiated power numerically, to the nearest 10 W. ▸ View Available Hint(s)…arrow_forward4. The sun has a mass of Mo=2.0 x 1030 kg and it radiates P = 3.8 x 1026 W in the form of electromagnetic radiation. The gravitational constant is G = 6.7 x 10-11 N- (a) Find expressions for the gravitational and electromagnetic forces on a sphere of radius r which is located a distance R from the center of the sun, assuming that all of the electromagnetic radiation incident on the sphere is absorbed, and that the sphere is composed of material with a density of p=5 g/cm³. (b) For what value of r are these forces equal? I would like for you to calculate the actual number for this part. 44°F Search Sunny TAB CAPS LOCK E 3 L % S T བ ༥ ཇ་ཥ ་ F 9 YUEOPL K CTRL SHIFT NVIDIA GEFORCE RTX N ALT x C B m BACKSPACE 5:44 PM 3/24/2024 DELETE PGONarrow_forwardAn expensive vacuum system can achieve a pressure as low as 1.00 x 10-8 N/m² at 21.5 °C. How many atoms N are there in a cubic centimeter at this pressure and temperature? The Boltzmann constant k = 1.38 x 10-23 J/K. O 2.46 x 106 atoms O 2.44 x 104 atoms O 2.46 x 105 atoms O 2.46 x 107 atoms O 2.46 x 108 atomsarrow_forwardA deep-sea diver is suspended beneath the surface of Loch Ness by a cable of length h= 100 mthat is attached to a boat on the surface (Figure 1). The diver and his suit have a total mass of m= 120 kgand a volume of V= 7.70×10−2m3. The cable has a diameter of 1.85 cmand a linear mass density of μ= 1.19 kg/m. The diver thinks he sees something moving in the murky depths and jerks the end of the cable back and forth to send transverse waves up the cable as a signal to his companions in the boat. Please help. I got stucked.arrow_forward2. (a) The temperature in an auditorium is given by1 =x+y°-z A mosquito located at (1, 1, 2) in the auditorium desires to fly in such a direction that it will get warm as soon as possible. In what direction must it fly? (b) (By applying Stokes Theorem; from the differential form of Ampere-Maxwell law, prove that $ H.dl=I+Ip.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning