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How do you account for the fact that resistivity of metals increases with increase in temperature but that of semiconductors decreases? Also describe the effect of temperature on the conductivity of Semiconductors.
Charge A and charge B are 2.5 m apart. Charge A is 1.4C and charge B is 2.5C. Charge C, which is 2.0 C, is situated between them and force on charge C is zero. How far from charge A is Charge C.
What is the CD's moment of inertia for rotation about a perpendicular axis through the edge of the disk? Express your answer to two significant figures.
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. Evaluate how long is the ball in the air
A container is filled to the brim with 1.4 L of mercury at 20°C. As the temperature of the container and mercury is increased to 50°C, Determine the linear expansion coefficient of the material
In a women's 100-m race, accelerating uniformly, Laura takes 1.98 s and Healan 3.17 s to attain their maximum speeds, What is the maximum distance by which Healan is behind Laura
A cell membrane is composed of lipid molecules and approximately 10.48 nm thick. If the dielectric constant of the lipid is k = 5, what is the approximate capacitance of a spherical cell that has a diameter of 10.48 mu m?
when jumping straight down you can be seriously injured if you land stiff-legged. one way to avoid injury is to bend
A flat sheet is in the shape of a rectangle with sides of lengths 0.400 m and 0.600 m . The sheet is immersed in a uniform electric field of magnitude 74.5 N/C that is directed at 20 degrees from the plane of the sheet. Find the magnitude of the e..
The figure below shows a resistor of resistance R =6.33 Ω connected to an ideal battery of emf = 14.0 V by means of two copper wires. Each wire has length23.3 cm and radius 4.10 mm. In dealing with such circuits in thischapter, we generally neglec..
What are ranges of wavelength and frequency
A certain telescope has an objective of focal length 1560 cm. If the Moon is utilized as an object, a 1.4 cm long image formed by the objective corresponds to what distance, in miles, on the Moon? Assume 3.8 multiplied by 108 m for the Earth-Moon dis..
at highway speeds a particular automobile is capable of an acceleration of about 1.6 ms2. at this rate how long does it
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