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A closed box is filled with dry ice at a temperature of -88.7 oC, while the outside temperature is 24.4 oC. The box is cubical, measuring 0.354 m on a side, and the thickness of the walls is 3.88 × 10-2 m. In one day, 3.73 × 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made.
question 1 silver has a resistance of 0.00198 ohms. what voltage would produce a current of 100 a?question 2 find the
A 34.7 m long aluminum wire at a temperature of 24.3 oC has a radius of 0.295 mm. what is the resulting current in the wire
A laser beam shines onto a slit of width 0.1 mm and the diffraction pattern is projected onto a screen 2 m from the slit. what is the wavelength of the laser beam
Two coils are wound around the same cylindrical form. When the current in the first coil is decreasing at a rate of -0.240 A/s , What is the mutual inductance of the pair of coils
A standardized biological microscope has an 8.0--focal-length objective. What focal-length eyepiece should be used to achieve a total magnification of.
A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.00 cm wide and 10.0 m long. What is the maximum charge that can be stored in this capacitor
A reflecting telescope has a main mirror with fM = 620 mm. If an eyepiece with a magnification of 15 is used, what is the total magnification of the telescope
A 500 kg polar bear of average density 950 kg/m3 is stranded on a melting chunk of ice in the ocean. What is the smallest volume of ice that will keep the bear entirely above water
The pendulum of a regulator clock consists of a mass of .12kg at the end of a massless wooden stick of length .44m. What is the speed of the mass when at its lowest point
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.8 m/s, grabs him. find the mass of the receiver
If 3.15×10-4 J of work are required to move 17.7? C of charge from one point to another, what is the electric potential difference between the two points
The larger molecule HI has a bond length of 160.92 pm (H=1, I=127). its bond's force constant is 314 N/m. what are the frequencies of light for that will excite the lowest energy rotational and vibrational translations
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