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Temperatures of two similar metal spheres differently fixes in the space. The problem which does not need calculations but only a correct understanding of the applied energy distribution.
Two similar metal spheres are located at the same height from the earth surface. The first is pended on the end of a rod and the second is propped up (supported) by the similar rod. Both are heated with the same quantity of heat Q.
Will the temperatures of these two spheres be equal? If not, the temperature of which is higher?
The Arecibo radio telescope in Puerto Rico can detect a wave with an intensity as low as 1x10-23 W/m2. As a “best-case” scenario for communication with extraterrestrials, consider the following: Assume an advanced civilization located at point A, a d..
A fire truck connects their hose (radius r1 = 5 cm) to a fire hydrant. The underground water lines have a radius of r2 = 15 cm, How high above the end of the hose will the water reach
Calculate the moment of inertia of a skater given the following information. THe 65 kg skater is approximated as a cylinder that has a .110 m radius
A sphere with a diameter of 70 cm is held at a temperature of 290°C and is radiating energy. what is the emissivity of the sphere
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
You are holding a compass 3.60 m from a longstraight electrical supply wire that is carrying a direct currentperpendicularly to the local direction of the Earth's magneticfield. Instead of orienting to any consistent "north" direction,the compass ..
a cylindrical tank is 50 ft deep 39.5 ft in diameter and filled up to the top with water. a flashlight shines into the
An extremely thin film of soapy water (n = 1.26) sits on top of a flat glass plate with n =1.51. The soap film has a red color when viewed at normal incidence. What is the thickness of the film? (Wavelength of red, or lambda = 640nm.)
If a 1000 hertz signal has a time base measurement that is off by 15 percent, determine the possible ranges in the value for the period of the signal
Five-gram samples of copper and aluminum are at room temperature
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 4.00 cos (t +?/5), Find the period and amplitude of the motion
The voltage across an air-filled parallel-plate capacitor is measured to be 110.0 V. When a dielectric is inserted and completely fills the space between the plates as in the figure below, the voltage drops to 29.7 V.
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