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A solid cylinder of radius r1 = 3.0 cm, length h1 = 6.0 cm, emissivity 0.87, and temperature 35°C is suspended in an environment of temperature 64°C.
(a) What is the cylinder's net thermal radiation transfer rate P1?
(b) If the cylinder is stretched until its radius is r2 = 0.42 cm, its net thermal radiation transfer rate becomes P2. What is the ratio P2/P1?
A ball thrown horizontally at 28 m/s travels a horizontal distance of 55 m before hitting the ground. From what height was the ball thrown
While sitting in physics class one day, you begin to ponder the workings of the analog clock on the classroom wall. Calculate the angular velocity of the second hand
Gas is contained in a 9.00-L vessel at a temperature of 25.0°C and a pressure of 5.00 atm. Determine the number of moles of gas in the vessel
An electron is in a certain energy state in a one-dimensional, infinite potential well from x = 0 to x = L = 125 pm. What is the change in the electron's energy
A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are vertical to the book and are horizontal.
The filament of an incandescent light bulb is made of tungsten which has a thermal coefficient of resistivity of ? = 4.4 x 10-3K-1, Write an equation for the initial current, I0, that flows through the filament when it is initially turned on
An LC circuit has a 7.88 mH inductor. The current has its maximum value of 0.73 A at t=0 s, What is the value of the capacitance
The strength of interatomic bonding in two elemental crystalline materials is approximately the same, but Material #1 is composed of atoms that are approximately 4 times heacier compared to Material #2.
How did Pavlov and Watson's focus on scientific inquiry of behaviours differ from earlier viewpoints of structuralisms, psychoanalysts, and functionalists.
A pole vaulter is running with a 2.5 kg carbon pole that is 4.5 meters long, holding it level to the ground. Calculate the forces that must be exerted by each of the two hands
A 1400 kg car carrying four 96 kg people travels over a "washboard" dirt road with corrugations 4.5 m apart. by how much does the car body rise on its suspension
Light of wavelength 380 nm is required to cause electrons to be ejected from the surface of a metal. What is the kinetic energy of the ejected electrons
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